CN115060017B

CN115060017B - Control method of refrigeration equipment, refrigeration equipment and storage medium

Info

Publication number: CN115060017B
Application number: CN202210999755.1A
Authority: CN
Inventors: 赖晓翔; 李长松; 瞿赛
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-01
Anticipated expiration: 2042-08-19
Also published as: CN115060017A

Abstract

The application provides a control method of refrigeration equipment, the refrigeration equipment and a storage medium, wherein the method comprises the steps of judging whether the lowest preset temperature minus the current temperature of a second refrigerant in a liquid carrying tank is larger than or equal to a first preset difference value or not; if not, closing the first outlet, opening the second outlet, opening the power piece or keeping the power piece open, and continuing to execute the judging steps; if yes, opening the first outlet, closing the second outlet, and opening or maintaining the power piece to be opened; judging whether the temperature of the second refrigerant subtracted from the lowest preset temperature is less than or equal to a second preset difference value or not; if yes, returning to close the first outlet, opening the second outlet, opening the power piece or maintaining the opening state of the power piece, and continuing to execute the steps; if not, returning to the step of judging whether the temperature of the second refrigerant subtracted from the lowest preset temperature is less than or equal to a second preset difference value. The flow direction of the first refrigerant is controlled by controlling the throttling control assembly, so that the refrigerating time of the first chamber for obtaining enough cold energy is prolonged.

Description

Control method of refrigeration equipment, refrigeration equipment and storage medium

Technical Field

The application belongs to the technical field of refrigeration equipment, and particularly relates to a control method of the refrigeration equipment, the refrigeration equipment and a storage medium.

Background

The prior art refrigeration devices usually adopt a distributed refrigeration mode to meet the storage requirements of different articles. In the refrigeration equipment in the prior art, one set of refrigeration system or two sets of refrigeration systems are generally adopted for refrigerating different compartments, but the refrigeration equipment for distributed refrigeration has a common problem: the refrigeration requests of the parallel refrigeration boxes are poor in synchronism due to different refrigeration temperatures, so that the refrigeration requests are frequently made by a refrigeration end, the refrigeration boxes cannot obtain enough refrigeration capacity for refrigeration for a long time, and the storage of articles in the refrigeration boxes is not facilitated. And the problem is significantly more severe when there are more refrigeration cases in parallel.

Disclosure of Invention

The application provides a control method of refrigeration equipment, the refrigeration equipment and a storage medium, which are used for solving the problem that a refrigerator body cannot obtain enough cold energy for refrigeration for a long time due to frequent refrigeration requests of the refrigerator body.

In order to solve the above technical problem, the present application provides a method for controlling a refrigeration apparatus, including:

the refrigeration equipment comprises a first refrigeration system for circulating a first refrigerant, a second refrigeration system for circulating a second refrigerant and a heat exchange device, wherein the first refrigerant and the second refrigerant respectively flow through the heat exchange device for heat exchange; the second refrigeration system comprises a power part, a liquid carrying tank and at least one sub-evaporator which are sequentially connected in sequence, each sub-evaporator is located in a second chamber of the refrigeration equipment, each second chamber has a first shutdown temperature, and the lowest preset temperature is the first shutdown temperature with the lowest temperature, and the control method comprises the following steps:

judging whether the current temperature of a second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature is greater than or equal to a first preset difference value or not;

if not, closing the first outlet, opening the second outlet, opening the power part or maintaining the power part in an opening state, and continuously executing the step of judging whether the current temperature of the second refrigerant in the carrier liquid tank subtracted by the lowest preset temperature is greater than or equal to a first preset difference value or not;

if yes, opening the first outlet, closing the second outlet, and opening the power member or maintaining the power member in an open state;

judging whether the lowest preset temperature minus the current temperature of a second refrigerant in the liquid carrying tank is smaller than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value;

if yes, returning to close the first outlet, opening the second outlet, opening the power part or maintaining the power part in an opening state, and continuously judging whether the current temperature of a second refrigerant in the carrier liquid tank subtracted from the lowest preset temperature is larger than or equal to a first preset difference value or not;

if not, returning to the step of judging whether the difference between the lowest preset temperature and the current temperature of the second refrigerant in the liquid carrying tank is smaller than or equal to a second preset difference value.

The step of judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference value comprises the following steps:

and obtaining the current temperature of the second refrigerant in the liquid carrying tank, and judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature is greater than or equal to a first preset difference value or not.

and acquiring the current temperature of each second chamber, judging whether the current temperature of at least one second chamber is lower than a first shutdown temperature, if so, judging to acquire a shutdown request of at least one second chamber, acquiring the current temperature of a second refrigerant in the carrier liquid tank, and judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the carrier liquid tank is more than or equal to a first preset difference value.

Wherein, before the step of judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference, the method further comprises:

judging whether all the second chambers send out shutdown requests, if so, closing the power part or maintaining the closed state of the power part; if not, executing the step of judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference value.

Wherein the step of determining whether all of the second compartments have issued shutdown requests comprises:

and acquiring the current temperature of each second chamber, and judging whether the current temperature of each second chamber is lower than the first shutdown temperature of each second chamber one by one.

Each second compartment also has a first start-up temperature, a second stop temperature and a second start-up temperature, wherein the first start-up temperature is higher than the second start-up temperature and the second stop temperature is higher than the first stop temperature.

After the steps of closing the first outlet, opening the second outlet, opening the power element or maintaining the power element in an open state, the step of judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the carrier tank is greater than or equal to a first preset difference value further comprises the following steps:

and acquiring the current temperature of each second compartment, when the current temperature of any second compartment is lower than a first shutdown temperature, all the second compartments acquire shutdown requests of the second compartments according to whether the current temperature of the second compartment is lower than the second shutdown temperature, and all the second compartments acquire refrigeration requests of the second compartments according to whether the current temperature of the second compartment is higher than a second startup temperature.

and acquiring the current temperature of each second chamber, and judging whether the current temperature of each second chamber is lower than the second shutdown temperature of each second chamber one by one.

The step of judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference value comprises the following steps:

and acquiring the current temperature of the second refrigerant in the liquid carrying tank, and judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature is less than or equal to a second preset difference value or not.

and obtaining the current temperature of each second compartment, judging whether the current temperature of at least one second compartment is higher than a second starting temperature, if so, judging to obtain a refrigeration request of at least one second compartment, obtaining the current temperature of a second refrigerant in the liquid carrying tank, and judging whether the minimum preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference value.

The application also provides refrigeration equipment, which comprises a first refrigeration system for circulating a first refrigerant, a second refrigeration system for circulating a second refrigerant, a heat exchange device and a control piece, wherein the first refrigerant and the second refrigerant respectively flow through the heat exchange device for heat exchange, the first refrigeration system comprises a throttling control assembly and a first evaporator, a first outlet of the throttling control assembly is connected with the first evaporator, a second outlet of the throttling control assembly is connected with the heat exchange device, and the first evaporator is positioned in a first chamber of the refrigeration equipment; the second refrigeration system comprises a power part, a liquid carrying box and at least one sub-evaporator which are sequentially connected in sequence, each sub-evaporator is located in a second compartment of the refrigeration equipment, the control part is electrically connected with the first refrigeration system and the second refrigeration system, and the control part is used for executing the control method of the refrigeration equipment.

The present application also proposes a storage medium storing program data executable to implement the control method of a refrigeration appliance as described above.

Different from the prior art, the beneficial effects of the embodiment of the application are that: the application provides a control method of refrigeration equipment, the refrigeration equipment and a storage medium, wherein the control method of the refrigeration equipment comprises the steps of judging whether the lowest preset temperature minus the current temperature of a second refrigerant in a liquid carrying tank is larger than or equal to a first preset difference value or not; if not, closing the first outlet, opening the second outlet, opening the power part or maintaining the power part in an opening state, and continuously executing the step of judging whether the current temperature of the second refrigerant in the carrier liquid tank subtracted by the lowest preset temperature is greater than or equal to a first preset difference value or not; if yes, opening the first outlet, closing the second outlet, and opening the power member or maintaining the power member in an open state; judging whether the lowest preset temperature minus the current temperature of a second refrigerant in the liquid carrying tank is smaller than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value; if yes, returning to execute the steps of closing the first outlet, opening the second outlet, opening the power element or maintaining the opening state of the power element, and continuously executing the step of judging whether the lowest preset temperature minus the current temperature of the second refrigerant in the carrier liquid tank is larger than or equal to a first preset difference value; if not, returning to the step of judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted by the lowest preset temperature is less than or equal to a second preset difference value. The flow direction of the first refrigerant is controlled by controlling the throttling control assembly, the cold storage capacity of the second refrigerant in the liquid carrying box is fully utilized, on the basis of ensuring the cold storage capacity of the second chamber, the cold storage capacity of the first refrigerant used for the heat exchange device is used for refrigerating the first chamber, the refrigerating time of the first chamber for obtaining enough cold is prolonged, and the storage of the first chamber is prevented from being influenced due to the fact that the refrigerating time or refrigerating capacity of the first chamber is insufficient.

Drawings

FIG. 1 is a schematic block diagram of one embodiment of a refrigeration unit provided herein;

FIG. 2 is a schematic flow diagram of one embodiment of a control method applied to the refrigeration appliance shown in FIG. 1;

FIG. 3 is a schematic flow diagram of another embodiment of a control method applied to the refrigeration appliance shown in FIG. 1;

FIG. 4 is a graph illustrating the cooling rate of the control method provided herein for cooling a plurality of second compartments;

FIG. 5 is a schematic diagram of a frame structure of an embodiment of a refrigeration unit provided herein;

FIG. 6 is a block diagram of an embodiment of a storage medium provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the related art, the distributed refrigeration equipment mostly adopts a primary refrigerant and secondary refrigerant mixed refrigeration mode to refrigerate a freezing end and a refrigerating end, and the refrigerating end is a plurality of refrigerating box bodies connected in parallel. The inventor finds that the basic control logic of the distributed refrigeration equipment is as follows, when the temperature of a certain box body reaches the starting temperature of the box body, refrigeration is requested, and a refrigeration passage of a corresponding pipeline is opened and starts to refrigerate; when the temperature of a certain box body reaches the shutdown temperature of the box body, the shutdown is requested, and the refrigeration passage of the corresponding pipeline is closed and stops refrigerating. Therefore, the running condition of the control logic often has the condition that one box body starts to return to the temperature after being stopped, and the other box body reaches the starting temperature again to request refrigeration, so the refrigeration request of the refrigerating end is poor in synchronism and frequent in refrigeration request, and the refrigeration request of the refrigerating end is more frequent under the condition that more refrigerating box bodies are connected in parallel. Therefore, the refrigerating end box body cannot obtain enough cold energy for a long time, so that the refrigerating end box body is in a high-temperature state, cannot reach the refrigerating temperature required by storage, and storage of articles is influenced. Particularly, in the case where the target freezing temperature of the freezing-end tank is lower, the influence on the freezing end is more serious.

Therefore, an embodiment of the present application provides a method for controlling a refrigeration apparatus. Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a refrigeration apparatus provided in the present application. The refrigeration equipment 100 includes a first refrigeration system 110 for circulating a first refrigerant, a second refrigeration system 130 for circulating a second refrigerant, and a heat exchange device 120. The first refrigerant and the second refrigerant respectively flow through the heat exchanging device 120 for heat exchange.

The first refrigeration system 110 includes a compressor 111, a condenser 112, a throttle control assembly 117, and a first evaporator 113, which are sequentially connected in series to form a circuit. Throttle control assembly 117 has one inlet and two outlets. The output end of the first evaporator 113 is connected with the input end of the compressor 111, the output end of the compressor 111 is connected with the input end of the condenser 112, the output end of the condenser 112 is connected with the inlet of the throttle control assembly 117, and the first outlet of the throttle control assembly 117 is connected with the input end of the first evaporator 113. A first refrigerant flows in the first refrigeration system 110 in a circulating manner, the compressor 111 provides power for the circulation of the first refrigerant, the first refrigerant enters the condenser 112, is changed into a liquid state after exchanging heat with ambient air, passes through the throttle control assembly 117, and enters the first evaporator 113 for refrigerating the first compartment.

The second refrigeration system 130 includes a power element 131, a liquid carrying tank 134 and a second evaporator group 132 connected in series in sequence to form a circuit. A second refrigerant circulates in the second refrigeration system 130, the power component 131 provides power for the circulation of the second refrigerant, the liquid carrying tank 134 stores the second refrigerant, the second evaporator group 132 is used for refrigerating the second intermediate space, the second evaporator group 132 includes a plurality of sub-evaporators 133, and each sub-evaporator 133 is located in a second intermediate space. The second refrigerant flows through a plurality of sub-evaporators 133 of the refrigeration apparatus 100 arranged in parallel to refrigerate the second compartment.

Heat exchanging device 120 includes a first input, a second input, a first output, and a second output. The first input communicates with the condenser 112. The first output port communicates with the first evaporator 113. The second input communicates with the carrier tank 134. The second output communicates with a second evaporator group 132. After flowing out of the condenser 112, the low-temperature first refrigerant enters the first input end through the second outlet of the throttling control assembly 117, flows to the heat exchanging device 120, and flows out of the first output end to the first evaporator 113. After flowing out of the liquid carrying tank 134, the second refrigerant may flow from the second input end to the heat exchanging device 120, and the second refrigerant absorbs the cold energy of the first refrigerant in the heat exchanging device 120 and flows out of the second output end to the second evaporator group 132. Therefore, the first refrigeration system 110 can refrigerate the first compartment through the first evaporator 113, the first refrigeration system 110 can also provide refrigeration capacity for the second refrigeration system 130 through the heat exchange device 120, and the second refrigerant after being cooled is conveyed to the second evaporator group 132 through the pipeline of the second refrigeration system 130, and is refrigerated for the second compartment by the second evaporator group 132.

In some embodiments, the heat exchange device 120 includes a heat exchange chamber 121, a first heat exchange tube, and a second heat exchange tube (not shown in the figures). A heat exchange medium 123 is provided in the heat exchange chamber 121. The first heat exchanging pipe 122 is disposed in the heat exchanging chamber 121. An input end of the first heat exchange pipe 122 is communicated with a second outlet of the throttle control assembly 117, and an output end of the first heat exchange pipe 122 is communicated with the first evaporator 113. The second heat exchange pipe is disposed in the heat exchange chamber 121. The input end of the second heat exchange tube is communicated with the carrier liquid tank 134, and the output end of the second heat exchange tube is communicated with the second evaporator group 132. The input end of the first heat exchanging pipe 122 is the first input end, and the output end of the first heat exchanging pipe 122 is the first output end. The input end of the second heat exchange tube is the second input end, and the output end of the second heat exchange tube is the second output end.

Since the first heat exchange tube 122 communicates the condenser 112 and the first evaporator 113, the low-temperature first refrigerant flowing out of the condenser 112 may flow to the first heat exchange tube 122 and then flow to the first evaporator 113. The heat exchange medium 123 in the heat exchange chamber 121 can exchange heat with the first heat exchange tube 122, and the first cooling medium absorbs heat of the heat exchange medium 123 and reduces the temperature of the heat exchange medium 123. Meanwhile, the second heat exchange tube can exchange heat with the heat exchange medium 123, and the heat exchange medium 123 absorbs heat of the second refrigerant, so that the temperature of the second refrigerant is reduced. Therefore, when the first refrigerant and the second refrigerant flow through the heat exchanging device 120, the first refrigerant and the second refrigerant can exchange heat in the heat exchanging device 120. The second refrigerant is lowered in temperature to obtain a cooling capacity and circulated in the second refrigeration system 130 for cooling the second compartment.

In some embodiments, the throttle control assembly 117 includes a three-way solenoid valve 116. The three-way solenoid valve 116 has a first inlet port 1161, a first outlet port 1162, and a second outlet port 1163. The output of the condenser 112 is connected to a first inlet port 1161, a first outlet port 1162 is connected to the input of the first evaporator 113, and a second outlet port 1163 is connected to a first input of the heat exchanging device 120. The first outlet port 1162 and the second outlet port 1163 of the three-way solenoid valve 116 cannot be opened simultaneously, and when the first outlet port 1162 is opened, the second outlet port 1163 is closed; when the first outlet port 1162 is closed, the second outlet port 1163 is opened.

The flow direction of the first refrigerant can be controlled by providing the three-way solenoid valve 116. When the first outlet port 1162 is opened, the first refrigerant flows through the compressor 111, the condenser 112, and the three-way solenoid valve 116 to the first evaporator 113, and the first refrigerant provides all of the cooling capacity for the first evaporator 113. When the second outlet port 1163 is opened, the first refrigerant flows through the compressor 111, the condenser 112, the three-way solenoid valve 116, and the heat exchanging device 120 to the first evaporator 113, and since the first refrigerant exchanges heat with the second refrigerant at the heat exchanging device 120, the temperature of the first refrigerant is greatly increased and the cooling capacity acting on the first chamber is reduced when the first refrigerant finally flows through the first evaporator 113.

Each second compartment has a respective first start-up temperature Tki and first stop temperature Tti, since the target cooling temperature is different for each second compartment. And when any second compartment temperature is less than or equal to the first shutdown temperature Tti of the compartment after the refrigeration equipment is started, acquiring a shutdown request of the compartment. And when any second compartment temperature is greater than or equal to the first starting temperature Tki of the compartment, acquiring a refrigeration request of the compartment. The lowest preset temperature MIN (Tti) is set as the first shutdown temperature Tti at the lowest temperature.

Referring to fig. 2, fig. 2 is a schematic flow chart illustrating an embodiment of a control method of a refrigeration apparatus according to the present application. For ease of understanding, reference is also made to fig. 1.

The control method of the refrigeration equipment comprises the following steps:

s11: and starting.

Specifically, the compressor 111, the condenser 112, the first evaporator 113, and the second evaporator group 132 are turned on, so that the refrigeration apparatus 100 starts to operate.

S12: and judging whether the current temperature Tw of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature MIN (Tti) is greater than or equal to a first preset difference value or not. If not, executing step S13; if yes, go to step S14.

In some embodiments, the first predetermined difference is set according to the cold storage capacity of the second refrigerant and the time acting on the second evaporator group 132. In this embodiment, the first predetermined difference is set to 5 ℃. Therefore, it is necessary to determine whether MIN (Tti) -Tw.gtoreq.5 ℃.

In some embodiments, the step of determining whether the minimum preset temperature MIN (Tti) minus the current temperature Tw of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference value comprises:

and acquiring the current temperature Tw of the second refrigerant in the liquid carrying tank every other first preset time, and judging whether the current temperature Tw of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature MIN (Tti) is greater than or equal to a first preset difference value or not.

In some embodiments, the step of determining whether the minimum preset temperature MIN (Tti) minus the current temperature Tw of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference may further include:

when a shutdown request of at least one second compartment is acquired, acquiring the current temperature Tw of a second refrigerant in the liquid carrying tank, and judging whether the current temperature Tw of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature MIN (Tti) is greater than or equal to a first preset difference value or not.

In some embodiments, the current temperature Tsi of each second compartment is obtained every second preset time, and it is determined whether the current temperature Tsi of at least one second compartment is lower than the first shutdown temperature Tti, and if so, it is determined that a shutdown request for at least one second compartment is obtained.

After the start, it is determined whether the minimum preset temperature MIN (Tti) minus the current temperature Tw of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference, and it can be determined whether the second refrigerant has enough cooling capacity to supply the second refrigeration system 130 for refrigeration, so as to determine the flow path of the first refrigerant, and avoid the problem of frequent switching of the three-way solenoid valve 116, which results in the back-and-forth switching of the flow path of the first refrigerant, and thus determine the optimal path after the refrigeration equipment 100 starts.

S13: and closing the first outlet, opening the second outlet, opening the power element or maintaining the opening state of the power element, and continuously judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature is greater than or equal to a first preset difference value or not.

Specifically, after the second refrigerant is judged to lack sufficient cooling capacity to be used for the second refrigeration system 130 to refrigerate, the first refrigeration system 110 preferentially provides cooling capacity for the second refrigeration system 130 through the heat exchange device 120. Therefore, the three-way solenoid valve 116 receives a signal to close the first outlet port 1162, open the second outlet port 1163, and open the power member 131. The first refrigerant passes through the compressor 111, the condenser 112, the three-way solenoid valve 116, the heat exchanger 120, and then to the first evaporator 113. The second refrigerant passes through the liquid carrying tank 134, the heat exchanging device 120 and then to the second evaporator set 132. The first refrigerant exchanges heat with the second refrigerant at the heat exchanging device 120, so that the refrigeration equipment 100 preferentially refrigerates the second compartment, and has less refrigeration capacity for the first compartment.

S14: and opening the first outlet, closing the second outlet, and opening or maintaining the power member in an open state.

Specifically, when it is determined that the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of the second refrigerant in the liquid-carrying tank is greater than or equal to the first preset difference, the temperature of the second refrigerant is low enough, the first refrigeration system 110 does not need to provide cooling capacity for the second refrigeration system 130, and the second refrigeration system 130 can be used for refrigerating the second compartment by using the cooling capacity of the second refrigerant. Therefore, the three-way solenoid valve 116 receives the signal to open the first outlet port 1162, close the second outlet port 1163, and open the power element 131. The first refrigerant passes through the compressor 111, the condenser 112, and the three-way solenoid valve 116 to the first evaporator 113. The first refrigerant does not need to exchange heat with the second refrigerant at the heat exchange device 120, so that the cold energy of the first refrigeration system 110 is completely used for refrigerating the first compartment. The time for the first compartment to obtain sufficient cooling capacity is extended so that the first compartment can maintain the target cooling temperature.

S15: judging whether the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of a second refrigerant in the carrier liquid tank is smaller than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value; if yes, returning to execute the step S13; if not, whether the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of the second refrigerant in the carrier tank is smaller than or equal to a second preset difference value is continuously judged.

Specifically, a second preset difference is set according to the cold storage capacity of the second refrigerant and the time acting on the second evaporator group 132. In this embodiment, the second predetermined difference is set to 1 ℃. Therefore, it is necessary to determine whether MIN (Tti) -Tw.ltoreq.1 ℃.

In some embodiments, the step of determining whether the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of the second refrigerant in the liquid-carrying tank is less than or equal to a second preset difference value comprises:

and acquiring the current temperature Tw of the second refrigerant in the carrier liquid tank every other third preset time, and judging whether the current temperature Tw of the second refrigerant in the carrier liquid tank subtracted from the lowest preset temperature MIN (Tti) is less than or equal to a second preset difference value or not.

In some embodiments, the step of determining whether the difference between the minimum preset temperature MIN (Tti) and the current temperature Tw of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference may further include:

when a refrigeration request of at least one second compartment is acquired, whether the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of a second refrigerant in the liquid carrying tank is smaller than or equal to a second preset difference value or not is judged.

In some embodiments, the current temperature Tsi of each second compartment is obtained every fourth preset time, whether the current temperature Tsi of at least one second compartment is higher than the first starting temperature Tki is judged, and if yes, it is judged that the refrigeration request of at least one second compartment is obtained.

Specifically, when the minimum preset temperature MIN (Tti) minus the current temperature Tw of the second refrigerant in the liquid-carrying tank is less than or equal to a second preset difference, the temperature of the second refrigerant has been greatly increased, and the cold accumulated in the second refrigerant is about to be used up, it is necessary for the first refrigeration system 110 to continue to provide cold to the second refrigeration system 130 through the heat exchange device 120. Therefore, the three-way solenoid valve 116 receives the signal to close the first outlet port 1162 and open the second outlet port 1163, so as to maintain the open state of the power component 131. The first refrigerant passes through the compressor 111, the condenser 112, the three-way solenoid valve 116, and the heat exchanging device 120 to the first evaporator 113. The first refrigerant needs to exchange heat with the second refrigerant at the heat exchanging device 120, so that the cooling capacity of the first refrigeration system 110 is largely used for supplying refrigeration to the second refrigeration system 130, so that the cooling capacity of all the second compartments in the second refrigeration system 130 is enough to maintain the target refrigeration temperature of all the second compartments. When the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of the second refrigerant in the liquid-carrying tank is greater than the second preset difference, the cooling capacity of the second refrigerant is not greatly increased, and the second refrigerant can also continue to supply cooling to the second refrigeration system 130, so as to maintain the stability of the cooling capacity of the second compartment, and thus the first refrigeration system 110 is not required to supply cooling capacity to the second refrigeration system 130.

To save the cooling capacity of the second refrigeration system 130, the power consumption of the power member 131 is saved to the maximum extent to avoid unnecessary waste. Referring to fig. 3, fig. 3 is a schematic flow chart of another embodiment of a control method of a refrigeration apparatus according to the present application. For ease of understanding, reference is also made to fig. 1.

The control method of the refrigeration apparatus 100 includes:

s141: it is determined whether all of the second compartments have issued shutdown requests. If yes, go to S142; if not, S15 is continuously executed.

In some embodiments, every fifth preset time, the current temperature Tsi of each second chamber is obtained, and whether the current temperature Tsi of each second chamber is lower than the first shutdown temperature Tti of each second chamber is determined one by one.

S142: if so, the power member is closed or the closed state of the power member is maintained.

Specifically, when the current temperature Tsi of all the second compartments is lower than the first shutdown temperature Tti of each second compartment, that is, all the second compartments do not need to be cooled continuously, the second refrigerant does not need to be supplied to the second evaporator group 132 to cool the second compartments, and the power unit 131 does not need to continuously provide power for the flow of the second refrigerant. Thus, shutting off the power member 131 can save power consumption and avoid unnecessary waste. Meanwhile, because the power element 131 generates heat during operation, a part of the generated heat will act on the second refrigeration system 130, which increases the heat of the second refrigeration system 130 and shortens the time for the second refrigerant to refrigerate the second refrigeration system 130. Therefore, when the second compartment does not need to be refrigerated, the power part 131 is turned off, which not only avoids the waste of power consumption, but also reduces the generation of heat, prolongs the refrigerating time of the second refrigerant, and also prolongs the time for the first compartment to obtain enough cold energy, so that the first compartment can maintain the target refrigerating temperature. When the current temperature Tsi of any second compartment is higher than the first shutdown temperature Tti, i.e., there is a second compartment that needs the second refrigeration system 130 to continue to provide cold for it, the power element 131 does not need to be turned off.

In some embodiments, in order to prolong the cooling time of the second refrigerant, as shown in fig. 4, the cooling rate of the second chambers in the control method provided by the present application is illustrated. Each second compartment is also set to have a respective second shutdown temperature Tti 'and second startup temperature Tki', the first startup temperature Tki being higher than the second startup temperature Tki 'and the second shutdown temperature Tti' being higher than the first shutdown temperature Tti. In some embodiments, the second shutdown temperature Tti '= (Tti + Tki)/2-X (Tki-Tti), and the second startup temperature Tki' = (Tti + Tki)/2 + X (Tki-Tti), where X is an adjustment index and has a value less than 0.5 and may be adjusted as needed. Because the power member 131 generates heat during operation, if the second compartment frequently sends out a refrigeration or shutdown request, the second refrigerant brings the heat generated by the power member 131 into the second compartment, and the cold consumption of the liquid carrying tank 134 is further accelerated. By the arrangement, the difference between the second shutdown temperature and the second startup temperature can be prevented from being too small, the second compartment is prevented from frequently initiating shutdown requirements and refrigeration requirements, and accordingly the refrigeration capacity consumption in the liquid carrying tank 134 is reduced.

As shown in fig. 4, R1, R2, and R3 respectively correspond to cooling rate curves of the three second compartments, and the cooling temperature of R1 is higher than that of R2 and higher than that of R3. Therefore, the first shutdown temperature Tt1 of R1 is greater than the first shutdown temperature Tt2 of R2 and greater than the first shutdown temperature Tt3 of R3, and similarly, the first start-up temperature Tk1 of R1 is greater than the first start-up temperature Tk2 of R2 and greater than the first start-up temperature Tk3 of R3.

Specifically, after the step S13 of closing the first outlet, opening the second outlet, and opening the power element or maintaining the power element in the open state, the step S12 of determining whether the minimum preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is greater than or equal to the first preset difference further includes:

and acquiring the current temperature Tsi of each second compartment every sixth preset time, and when the current temperature Tsi of any one second compartment is lower than the first shutdown temperature Tti, all the second compartments acquire shutdown requests of the second compartments according to whether the current temperature Tsi of the second compartment is lower than the second shutdown temperature Tti ', and all the second compartments acquire refrigeration requests of the second compartments according to whether the current temperature Tsi of the second compartment is higher than the second startup temperature Tki'.

That is, the second compartment receives cooling and starts to decrease the temperature after the start, when the temperature of R1 decreases to T1s, that is, the current temperature of R1 is the first shutdown temperature Tt1, and at this time, R1, R2, and R3 start to obtain the shutdown request or the cooling request according to the second shutdown temperature Tti 'and the second startup temperature Tki'. When the temperature of the R1 is less than or equal to the second shutdown temperature Tt1' of the compartment, acquiring a shutdown request of the compartment; and when the temperature of the R1 is more than or equal to the second starting temperature Tk1' of the compartment, acquiring the starting request of the compartment. Similarly, when the temperature of R2 is less than or equal to the second shutdown temperature Tt2' of the compartment, a shutdown request of the compartment is obtained; and when the temperature of the R2 is greater than or equal to the second starting temperature Tk2' of the compartment, acquiring the starting request of the compartment. When the R3 temperature is less than or equal to a second shutdown temperature Tt3' of the compartment, acquiring a shutdown request of the compartment; and when the temperature of the R3 is more than or equal to the second starting temperature Tk3' of the compartment, acquiring the starting request of the compartment.

By setting the second shutdown temperature Tti 'and the second startup temperature Tki', the startup/shutdown temperature difference of the second compartment is reduced, so that the cooling capacity required to be provided by the second refrigerant is reduced, the power of the power component 131 is reduced, the flow rate of the second refrigerant in the second refrigeration system 130 is reduced, and the refrigeration time of the second refrigerant is further prolonged.

Thus, in some embodiments, for steps S141, S142: judging whether all the second compartments send out shutdown requests or not, if so, closing the power part or maintaining the closed state of the power part; if not, the judgment is continuously carried out to judge whether the lowest preset temperature minus the current temperature of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference value. Specifically, the current temperature Tsi of each second chamber is obtained every fifth preset time, and whether the current temperature Tsi of each second chamber is lower than the second shutdown temperature Tti' of each second chamber is determined one by one. That is, when the current temperature Tsi of all the second compartments is lower than the second shutdown temperature Tti' of each second compartment, that is, all the second compartments do not need to continue cooling, so that the second refrigerant does not need to continue to provide cooling energy for the second cooling system 130, and the power member 131 does not need to continue to provide power for the flow of the second refrigerant.

In some embodiments, for step S15: and judging whether the difference between the lowest preset temperature MIN (Tti) and the current temperature Tw of the second refrigerant in the carrier liquid tank is smaller than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value.

Specifically, in some embodiments, when a cooling request of at least one second compartment is obtained, it is determined whether the minimum preset temperature MIN (Tti) minus the current temperature Tw of the second refrigerant in the carrier tank is less than or equal to a second preset difference. Specifically, the current temperature Tsi of each second compartment is obtained every fourth preset time, whether the current temperature Tsi of at least one second compartment is higher than the second starting temperature Tki' or not is judged, and if yes, the refrigeration request of at least one second compartment is obtained.

In some embodiments, after it is determined in S15 that the difference between the lowest preset temperature and the current temperature of the second refrigerant in the carrier tank is smaller than or equal to a second preset difference, all the second chambers obtain the shutdown request of the second chamber according to whether the lowest preset temperature is lower than the first shutdown temperature Tti, and all the second chambers obtain the refrigeration request of the second chamber according to whether the lowest preset temperature minus the current temperature of the second refrigerant in the carrier tank is higher than the first startup temperature Tki. When the lowest preset temperature MIN (Tti) minus the current temperature Tw of the second refrigerant in the liquid carrying tank is smaller than or equal to a second preset difference value, the second compartment recovers the original refrigeration logic, the second compartment does not obtain the shutdown request of the compartment according to whether the current temperature of the compartment is lower than the second shutdown temperature Tti 'or not, and does not obtain the refrigeration request of the compartment according to whether the current temperature of the second compartment is higher than the second startup temperature Tki'. And when the second compartment temperature is greater than or equal to the first starting temperature of the compartment, the refrigerating request of the compartment is obtained.

As shown in fig. 4, when the refrigeration apparatus 100 is turned on to Tws, the lowest preset temperature MIN (Tti) of the refrigeration apparatus 100 minus the current temperature Tw of the second refrigerant in the liquid-carrying tank is less than or equal to a second preset difference, and at this time, R1, R2, and R3 all resume to obtain the shutdown request and the refrigeration request according to the first shutdown temperature Tti and the first startup temperature Tki. When the temperature R1 is less than or equal to the first shutdown temperature Tt1 of the compartment, acquiring a shutdown request of the compartment; and when the temperature of the R1 is greater than or equal to the first starting temperature Tk1 of the chamber, acquiring a starting request of the chamber. Similarly, when the temperature of R2 is less than or equal to the first shutdown temperature Tt2 of the chamber, a shutdown request of the chamber is obtained; and when the temperature of R2 is more than or equal to the first starting temperature Tk2 of the chamber, acquiring the starting request of the chamber. When the temperature R3 is less than or equal to the first shutdown temperature Tt3 of the compartment, acquiring a shutdown request of the compartment; and when the temperature of the R3 is more than or equal to the first starting temperature Tk3 of the chamber, acquiring the starting request of the chamber.

Returning to step S13, the first refrigeration system 110 preferentially provides cooling energy to the second refrigeration system 130 through the heat exchange device 120. Therefore, the three-way solenoid valve 116 receives the signal to close the first outlet port 1162, open the second outlet port 1163, open the power element 131 or maintain the power element 131 in an open state. The first refrigerant passes through the compressor 111, the condenser 112, the three-way solenoid valve 116, the heat exchanger 120, and then to the first evaporator 113. The second refrigerant passes through the liquid-carrying tank 134, the heat exchanging device 120 and then to the second evaporator set 132. The first refrigerant exchanges heat with the second refrigerant at the heat exchanging device 120, so that the refrigeration equipment 100 gives priority to the refrigeration to the second compartment again, and the refrigeration capacity for the first compartment is less.

As shown in fig. 4, compared with the control logic of the original refrigeration equipment 100 based on the first on-off temperature, the control logic of the control method provided by the present application utilizes the function of cold storage of the carrier liquid tank 134, and when the cold quantity accumulated in the second refrigerant in the carrier liquid tank 134 is sufficient, the cold quantity of the first refrigeration system 110 is fully applied to the first compartment, so as to ensure that the first compartment can maintain sufficient cold quantity for refrigeration, and compared with the original control method, the control method of the present application creates a refrigeration time of Tws-T1s for the first compartment.

In some embodiments, whether the second compartment is in a cooling state may be controlled by controlling the opening or closing of the second evaporator group 132. When a cooling request for any one of the second compartments is received, the sub-evaporator 133 receives a signal to start operation, and starts cooling the second compartment. When a shutdown request for any one of the second compartments is received, the sub-evaporator 133 stops operating upon receiving a signal, and stops cooling the second compartment.

In some embodiments, as shown in fig. 1, the second refrigeration system 130 includes an output main 135, an output return main 136, a plurality of output branch 137, and a plurality of output return branch 138. The input end of the output main pipe 135 is connected with the second output end of the heat exchange device 120. The output end of the main output pipe 135 is connected to the input end of each of the branch output pipes 137. The plurality of output branched pipes 137 are provided in one-to-one correspondence with the sub-evaporators 133. The output end of each output branched pipe 137 is connected to the corresponding sub-evaporator 133. The plurality of return branch pipes 138 are provided in one-to-one correspondence with the sub-evaporators 133. The input end of each return branch pipe 138 is connected to each sub-evaporator 133, and the output end of each return branch pipe 138 is connected to the return main pipe 136. The output end of the return main pipe 136 is connected with the input end of the power element 131. The second refrigerant flowing out of the heat exchanger 120 is respectively delivered to each output branch pipe 137 through the output main pipe 135, and is delivered to the corresponding sub-evaporator 133. The second refrigerant flows back to the corresponding return branch pipe 138 through the sub-evaporator 133, flows back to the return main pipe 136 through the return branch pipe 138, and flows to the power element 131 through the return main pipe 136. Specifically, the sub-evaporator 133 may be provided with one, two, three, four, or more.

Wherein, the input end of the output branch pipe 137 is connected with the output end of the output main pipe 135 through a quick coupling, and the output end of the output branch pipe 137 is connected with the input end of the sub-evaporator 133 through a quick coupling. The input end of the input/output branch pipe 138 is connected to the output end of the sub-evaporator 133 through a quick coupling, and the output end of the input/output branch pipe 138 is connected to the input end of the input/output main pipe 136 through a quick coupling. The quick connector is connected with the pipeline, so that the installation convenience and safety can be improved.

Through setting up second evaporator group 132 into a plurality of parallelly connected sub-evaporators 133, the second refrigerant can be carried to each sub-evaporator 133 by the pipeline in, supplies each sub-evaporator 133 to be the cooling of second compartment respectively to increase second compartment distribution quantity, promote the storing space, improve refrigeration plant 100's variety, satisfy user's demand.

In some embodiments, as shown in fig. 1, each sub-evaporator 133 is connected in series with a switching valve 139. Each of the switching valves 139 may control whether the second refrigerant flows into the sub-evaporator 133, so as to control whether the sub-evaporator 133 starts or stops cooling of the second compartment. Each of the switching valves 139 is provided at an input end of the sub-evaporator 133. When the on-off valve 139 is opened, the second refrigerant flows into the sub-evaporator 133 after passing through the on-off valve 139, thereby starting cooling of the second compartment. When the on-off valve 139 is closed, the second refrigerant cannot flow into the sub-evaporator 133 through the on-off valve 139, and thus the cooling of the second compartment cannot be started.

When a cooling request for any one of the second compartments is acquired, the switch valve 139 is opened upon receiving a signal, and the second refrigerant flows into the sub-evaporator 133 through the switch valve 139 to start cooling the second compartment. When a shutdown request for any one of the second chambers is received, the on-off valve 139 is closed upon receiving the signal, and the second refrigerant cannot flow into the sub-evaporator 133, and refrigeration for the second chamber cannot be started.

The present application further provides that the control member 140 includes a sensing module and a control module.

The sensing module is used for detecting the temperature of the second refrigerant in the liquid carrying tank 134 and the temperature of the second compartment. Specifically, the temperature of the second refrigerant in the liquid-carrying tank 134 may be detected by a temperature sensor. The outlet of the three-way solenoid valve 116 is controlled by subtracting the detected current temperature of the second refrigerant in the liquid carrying tank 134 from the lowest preset temperature to determine whether the current temperature is greater than or equal to a first preset difference or less than or equal to a second preset difference. The temperature of the second compartment may be detected by a temperature sensor, and the temperature may be compared with the first on-off temperature or the second on-off temperature to control the cooling of the second compartment.

The control module is connected with the induction module and further comprises an electromagnetic valve module, a refrigeration module and a timing module.

Specifically, the solenoid valve module may control the opening and closing of the outlet of the three-way solenoid valve 116. When the step S13 is judged to be executed, the solenoid valve module controls the three-way solenoid valve 116 to close the first outlet port 1162 and open the second outlet port 1163. The first refrigerant passes through the compressor 111, the condenser 112, the three-way solenoid valve 116, the heat exchanger 120, and then to the first evaporator 113. The first refrigerant exchanges heat with the second refrigerant at the heat exchange device 120, so that the refrigeration equipment preferentially gives refrigeration to the second compartment, and the refrigeration capacity for the first compartment is less. When the step S14 is judged to be executed, the solenoid valve module controls the three-way solenoid valve 116 to open the first outlet port 1162 and close the second outlet port 1163. The first refrigerant passes through the compressor 111, the condenser 112, the three-way solenoid valve 116, and reaches the first evaporator 113. The first refrigerant does not need to exchange heat with the second refrigerant at the heat exchange device 120, so that the cold energy of the first refrigeration system 110 is completely used for refrigerating the first compartment. The time for the first compartment to obtain sufficient cooling capacity is prolonged, so that the first compartment can maintain the target cooling temperature.

Specifically, the refrigeration module is used for controlling refrigeration of the second compartment. When the current temperature of the second chamber is lower than the first shutdown temperature or the second shutdown temperature, the refrigeration module controls the sub-evaporator 133 to be started or controls the switch valve 139 to be started, so that the second refrigerant is used for the sub-evaporator 133 to start refrigeration of the second chamber. When the current temperature of the second compartment is higher than the first start-up temperature or the second start-up temperature, the refrigeration module controls the sub-evaporator 133 to close or controls the switch valve 139 to close, so that the second refrigerant cannot act on the sub-evaporator 133 to stop refrigerating the second compartment.

Specifically, the timing module times the first preset time, the second preset time, the third preset time, the fourth preset time, the fifth preset time and the sixth preset time. After the refrigeration equipment 100 is started, the timing module starts timing, and when the timing is finished, the temperature sensor starts to detect the temperature of the second refrigerant in the liquid carrying tank and the temperature of the second chamber. The time may be measured using a timer, may be measured over the internet via a wired or wireless network, or may be measured using other associated devices.

In some embodiments, the liquid-carrying tank 134 and the heat exchanging device 120 may be disposed in an insulating layer, so as to reduce the leakage of cold from the liquid-carrying tank 134. The heat exchanging device 120 can also be disposed in the liquid carrying tank 134, so as to save the volume of the refrigeration apparatus 100.

Since the lowest temperature achievable by the first refrigeration system 110 is lower than the lowest temperature achievable by the second refrigeration system 130, the first compartment is typically a freezer compartment, and the first evaporator 113 can be used to cool the freezer compartment. The second compartment is typically a refrigeration compartment and the sub-evaporator 133 may be used to cool the refrigeration compartment.

In some embodiments, the first refrigeration system 110 further includes a filter 118. The filter 118 performs a filtering function in the circulation of the first refrigerant. The first refrigeration system 110 further includes an accumulator 119 for storing the first refrigerant.

In some embodiments, the throttle control assembly 117 further comprises a first throttle assembly 114, a second throttle assembly 115. The first inlet port 1161 of the three-way solenoid valve 116 communicates with the output of the condenser 112. The first outlet port 1162 communicates with an input port of the first throttling element 114. The second outlet port 1163 communicates with the input port of the second throttling element 115. The output end of the first throttling member 114 communicates with the first evaporator 113. The output end of the second throttling element 115 is communicated with a heat exchange device 120. The first refrigerant output from the condenser 112 may flow to the first evaporator 113 through the three-way solenoid valve 116 and the first throttling part 114; the first refrigerant output from the condenser 112 may further flow to the heat exchanging device 120 through the three-way solenoid valve 116 and the second throttling element 115, and then flow from the heat exchanging device 120 to the first evaporator 113.

The first orifice 114 may be a capillary tube. The second throttling part 115 may employ an electronic expansion valve. The smaller the opening degree of the electronic expansion valve is, the lower the evaporation temperature of the first refrigerant is, and the faster the temperature decreases. The opening degree of the electronic expansion valve can be correspondingly adjusted according to the cold quantity required by the second refrigeration system 130, so that the evaporation speed of the first refrigerant is adjusted, the heat exchange efficiency of the heat exchange device 120 is adjusted, and the refrigeration efficiency of the second refrigeration system 130 is accurately controlled. In other embodiments, the second orifice 115 may also include a multi-way valve and a plurality of capillaries. The plurality of capillaries have at least two inner diameters and/or lengths, and the inner diameters and/or lengths of the capillaries are different, so that the throttling effect of the capillaries is different, for example, the throttling effect is more obvious when the inner diameter of the capillary with the same length is smaller, and the throttling effect is more obvious when the length of the capillary with the same inner diameter is longer. The multi-way valve has an input end and a plurality of output ends. The input end of the multi-way valve is communicated with a second outlet end 1163 of the three-way electromagnetic valve 116. The plurality of capillary tubes are connected in parallel, the input end of each capillary tube is connected with one output end of the multi-way valve, and the output end of each capillary tube is connected with the first input end of the heat exchange device 120. The opening degree of the second throttling element 115 can be adjusted by switching the capillary tubes with different inner diameters and/or lengths through the multi-way valve, and then the evaporation temperature of the first refrigerant can be adjusted.

Specifically, the power unit 131 may adopt a power pump or other power structure to drive the second refrigerant to circulate in the second refrigeration system 130. The power member 131 may be a water pump.

It should be noted that the first refrigerant and the second refrigerant may use the same or different refrigeration media. In order to reduce the usage amount of the traditional refrigerant and improve the environmental protection and safety, the second refrigerant can adopt water, glycol and the like.

In some embodiments, the first heat exchanging pipes 122 include at least two first pipe sections and at least one second pipe section, wherein the first pipe sections are arranged in an array along the first preset direction, and the second pipe sections sequentially connect two adjacent first pipe sections end to end, so that the first heat exchanging pipes 122 are arranged in a winding manner in the heat exchanging chamber 121, thereby increasing the contact area between the first heat exchanging pipes 122 and the heat exchanging medium 123 and improving the heat exchanging efficiency between the first refrigerant and the heat exchanging medium 123. Similarly, the second heat exchange tube may also include at least two third tube segments and at least one fourth tube segment, wherein the third tube segments are arranged in an array along the second preset direction, and the fourth tube segments sequentially connect two adjacent third tube segments end to end, so that the second heat exchange tube is arranged in a meandering manner in the heat exchange chamber 121, thereby increasing the contact area between the second heat exchange tube and the heat exchange medium 123, and improving the heat exchange efficiency of the second refrigerant and the heat exchange medium 123. Specifically, the heat exchange medium 123 may be a liquid, a gas or a solid, and is not limited herein. The heat exchange chamber 121 can be made of a heat insulation material, so that the loss of cold energy of the heat exchange medium 123 is avoided, and the heat insulation performance and the cold storage capacity of the heat exchange chamber 121 are improved.

In other embodiments, the heat exchange device 120 may also be a plate heat exchanger. The first refrigerant and the second refrigerant exchange heat through the plate heat exchanger, so that the first refrigeration system 110 can refrigerate for the first compartment through the first evaporator 113, the first refrigeration system 110 can also provide refrigeration for the second refrigeration system 130 through the heat exchange device 120, the second refrigerant after being cooled is conveyed to the second evaporator group 132 through a pipeline of the second refrigeration system 130, and the second compartment is refrigerated through the second evaporator group 132. In other embodiments, the heat exchanging device 120 may also be another heat exchanging structure for exchanging heat between the first refrigerant and the second refrigerant, and is not limited herein.

The pipelines of the first refrigerating system 110 and the second refrigerating system 130 are separately and independently arranged, the first refrigerating system 110 and the second refrigerating system 130 can refrigerate for different compartments respectively, the different compartments do not need to be intensively arranged, a certain distance can be formed between the different compartments, the effect of remote distributed refrigeration is achieved, the utilization rate of the refrigerating systems is high, and the power consumption is low. In addition, because the second refrigeration system 130 exchanges heat with the first refrigeration system 110 through the heat exchange device 120, in the second refrigeration system 130, the use of structures such as the compressor 111 and the condenser 112 is avoided, the part cost is saved, the volume occupied by the second refrigeration system 130 is reduced, and the volume ratio of the compartment where the second refrigeration system 130 is located is improved. First refrigerating system and second refrigerating system pass through the heat transfer device heat transfer in this application, compare in a refrigerant refrigeration, the refrigerating system of the pure parallelly connected structure of evaporimeter, and this application reduces refrigerant pipeline length, and the splice reduces, has reduced the danger that the refrigerant revealed, and the security improves, and reduces the refrigerant use amount, and is more energy-concerving and environment-protective.

The application provides a control method of refrigeration equipment, the flow direction of a first refrigerant is controlled by a control throttling control assembly, the cold storage function of a liquid carrying box is utilized, no part needs to be added, the cold storage capacity of a second refrigerant in the liquid carrying box is fully utilized under the condition that the cold storage capacity of a second refrigeration system is enough, on the basis of ensuring the cold capacity of a second compartment, the cold capacity of the first refrigerant used for a heat exchange device is completely used for refrigerating the first compartment, the storage function of the first compartment is prevented from being influenced due to the fact that the first compartment cannot obtain enough cold capacity due to poor refrigeration request synchronism and frequent request of the second refrigeration system is avoided, the cold capacity distribution is more reasonable and efficient, and the time of the first refrigeration system for concentrating cold capacity to refrigerate the first compartment is prolonged.

In addition, the power part is closed when the cold quantity of the second refrigerating system is enough and the temperature of the second chamber is lower than the shutdown temperature, so that the energy consumption of the second refrigerating system is reduced, and the cold storage refrigerating time of the second refrigerating system is prolonged. And a second starting temperature and a second stopping temperature are set, so that the power of the power part is reduced, the flow of a second refrigerant in the second refrigerating system is reduced, and the refrigerating time of the second refrigerating system for storing the refrigerating capacity is prolonged.

Referring to fig. 5, fig. 5 is a schematic view of a frame structure of an embodiment of a refrigeration apparatus provided in the present application.

Yet another embodiment of the present application discloses a refrigeration apparatus 100. The refrigeration apparatus 100 may employ any of the refrigeration apparatuses 100 (see fig. 1) in the above embodiments. Specifically, the refrigeration equipment 100 includes a first refrigeration system 110 circulating a first refrigerant, a second refrigeration system 130 circulating a second refrigerant, a heat exchanging device 120, and a control member 140. The first refrigerant and the second refrigerant flow through the heat exchanging device 120 for heat exchange. The first refrigeration system 110 comprises a throttling control assembly 117 and a first evaporator 113, a first outlet of the throttling control assembly 117 is connected with the first evaporator 113, a second outlet is connected with the heat exchange device 120, and the first evaporator 113 is positioned in a first compartment of the refrigeration equipment; the second refrigeration system 130 includes a power member 131, a liquid carrying tank 134 and at least one sub-evaporator 133, which are connected in sequence, and each sub-evaporator 133 is located in a second compartment of a refrigeration device. The control 140 is electrically connected to at least the first refrigeration system 110 and the second refrigeration system 130, and the control 140 is used to perform the control method of the refrigeration apparatus in any of the above embodiments.

Referring to fig. 6, fig. 6 is a schematic diagram of a frame of an embodiment of a storage medium provided in the present application.

A further embodiment of the present application provides a storage medium 20 having stored thereon program data which, when executed by a processor, implements the control method of the refrigeration appliance of any of the above-described embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a module or a unit is merely one type of logical division, and an actual implementation may have another division, for example, a unit or a component may be combined or integrated with another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a network unit. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium 20. Based on such understanding, the technical solutions of the present application, which are essential or contributing to the prior art, or all or part of the technical solutions may be embodied in the form of a software product, which is stored in a storage medium 20 and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium 20 includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.

The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes performed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. The control method of the refrigeration equipment is characterized in that the refrigeration equipment comprises a first refrigeration system for circulating a first refrigerant, a second refrigeration system for circulating a second refrigerant and a heat exchange device, wherein the first refrigerant and the second refrigerant respectively flow through the heat exchange device for heat exchange, the first refrigeration system comprises a throttling control assembly and a first evaporator, a first outlet of the throttling control assembly is connected with the first evaporator, a second outlet of the throttling control assembly is connected with the heat exchange device, and the first evaporator is positioned in a first compartment of the refrigeration equipment; the second refrigeration system comprises a power part, a liquid carrying tank and at least one sub-evaporator which are sequentially connected in sequence, each sub-evaporator is located in a second chamber of the refrigeration equipment, each second chamber has a first shutdown temperature, and the lowest preset temperature is the first shutdown temperature with the lowest temperature, and the control method comprises the following steps:

if yes, opening the first outlet, closing the second outlet, and opening or maintaining the power member in an open state;

judging whether the lowest preset temperature minus the current temperature of a second refrigerant in the carrier liquid tank is smaller than or equal to a second preset difference value, wherein the second preset difference value is smaller than the first preset difference value;

if not, returning to the step of judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted by the lowest preset temperature is less than or equal to a second preset difference value.

2. The control method of claim 1, wherein the step of determining whether the difference between the lowest preset temperature and the current temperature of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference value comprises:

and acquiring the current temperature of the second refrigerant in the liquid carrying tank, and judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted from the lowest preset temperature is greater than or equal to a first preset difference value or not.

3. The control method as claimed in claim 2, wherein the step of determining whether the difference between the lowest preset temperature and the current temperature of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference value comprises:

4. The method as claimed in claim 1, wherein the step of determining whether the difference between the lowest preset temperature and the current temperature of the second refrigerant in the liquid carrying tank is less than or equal to a second preset difference further comprises:

judging whether all the second chambers send out shutdown requests or not, if so, closing the power part or maintaining the closed state of the power part; if not, executing the step of judging whether the current temperature of the second refrigerant in the liquid carrying tank subtracted by the lowest preset temperature is less than or equal to a second preset difference value.

5. The control method according to claim 4, wherein the step of determining whether all of the second compartments have issued shutdown requests includes:

6. The control method of claim 5, wherein each of the second compartments further has a respective first start-up temperature, second stop temperature, and second start-up temperature, the first start-up temperature being higher than the second start-up temperature and the second stop temperature being higher than the first stop temperature.

7. The method as claimed in claim 6, wherein after the steps of closing the first outlet, opening the second outlet, opening the power device or maintaining the power device in the open state, the step of determining whether the difference between the lowest preset temperature and the current temperature of the second refrigerant in the liquid carrying tank is greater than or equal to a first preset difference further comprises:

and when the current temperature of any one second compartment is lower than a first shutdown temperature, all the second compartments obtain shutdown requests of the second compartments according to whether the current temperature of the second compartment is lower than the second shutdown temperature, and all the second compartments obtain refrigeration requests of the second compartments according to whether the current temperature of the second compartment is higher than a second starting temperature.

8. The control method according to claim 7, wherein the step of determining whether all of the second compartments have issued the shutdown request is:

9. The method of claim 8, wherein the step of determining whether the difference between the lowest predetermined temperature and the current temperature of the second refrigerant in the liquid-carrying tank is less than or equal to a second predetermined difference comprises:

10. The method of claim 9, wherein the step of determining whether the difference between the lowest predetermined temperature and the current temperature of the second refrigerant in the liquid-carrying tank is less than or equal to a second predetermined difference comprises:

11. The refrigeration equipment is characterized by comprising a first refrigeration system for circulating a first refrigerant, a second refrigeration system for circulating a second refrigerant, a heat exchange device and a control piece, wherein the first refrigerant and the second refrigerant respectively flow through the heat exchange device for heat exchange; the second refrigeration system comprises a power part, a liquid carrying tank and at least one sub-evaporator which are sequentially connected in sequence, each sub-evaporator is positioned in a second compartment of the refrigeration equipment, the control part is electrically connected with the first refrigeration system and the second refrigeration system, and the control part is used for executing the control method of the refrigeration equipment in any one of claims 1-10.

12. A storage medium characterized in that it stores program data executable to implement the control method of a refrigeration appliance according to any one of claims 1 to 10.