Control method of a refrigeration device and refrigeration device

Abstract

The application provides a control method of a refrigeration equipment and the refrigeration equipment. The control method comprises the following steps: controlling a cold quantity transmission system to transmit cold quantity to a first refrigeration chamber and a second refrigeration chamber; detecting a real-time temperature of the first refrigeration chamber, and then comparing a first temperature difference obtained with a first preset difference value; and according to a comparison result, controlling to reduce or stop transmitting cold quantity to the second refrigeration chamber, or continue transmitting cold quantity to the first refrigeration chamber and the second refrigeration chamber. By using the control method, the cold quantity supply and temperature stability of the first refrigeration chamber can be better ensured, and abnormal loss can be avoided. The operation control of the refrigeration equipment is safer and more reliable, and is beneficial to product popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, in particular to a control method of a refrigeration equipment and the refrigeration equipment. BACKGROUND

[0002] The mobile convenience store has the characteristics of convenient operation and flexible operation, and can better meet the individual entrepreneurship operation demand, and can also improve the convenience of daily life. In practical application, it needs to provide temperature stable storage space for fresh and frozen food, and usually also needs to consider the refrigeration demand of user operation space, and the power and power demand of the corresponding refrigeration unit are relatively high, thereby causing the manufacturing cost to be relatively high, and there is also the problem of inconvenient power supply in practical application. The industry also discloses a kind of refrigeration equipment with cold storage device, which can carry out peak shifting and store cold, and release the cold stored in it during the period when the cold demand is high, which reduces the power requirement of refrigeration unit to a certain extent. When the power of the refrigeration unit is reduced, part of the storage space may be overheated due to unreasonable cold distribution and control, affecting use.

[0003] Therefore, it is necessary to provide a new control method of a refrigeration equipment and the refrigeration equipment. SUMMARY

[0004] The present application aims to provide a control method of a refrigeration equipment and the refrigeration equipment, which can better maintain the temperature stability of the specified refrigeration chamber, is safe and reliable, and is convenient to apply.

[0005] To achieve the above-mentioned application purpose, the present application provides a control method of a refrigeration equipment, mainly comprising:

[0006] controlling the cold quantity transmission system to transmit cold quantity to the first refrigeration chamber and the second refrigeration chamber;

[0007] detecting the real-time temperature T1 of the first refrigeration chamber;

[0008] comparing the first temperature difference ΔT1 with the first preset difference d1, wherein the first temperature difference ΔT1 is the difference between the real-time temperature T1 of the first refrigeration chamber and the set temperature Ts1 of the first refrigeration chamber, ΔT1=T1-Ts1;

[0009] if ΔT1≥d1, controlling to reduce the transmission of cold quantity to the second refrigeration chamber, or stopping the transmission of cold quantity to the second refrigeration chamber;

[0010] if ΔT1

[0011] As a further improvement of the present application, the "controlling the cold quantity transmission system to transmit cold quantity to the first refrigeration chamber and the second refrigeration chamber" means transmitting the cold quantity stored in the cold storage device to the first refrigeration chamber and the second refrigeration chamber.

[0012] As a further improvement of the present application, the control method further comprises a step of storing cold in the cold storage device, wherein the step of storing cold comprises detecting a real-time temperature T3 of the third refrigeration compartment;

[0013] As a further improvement of the present application, the step of storing cold comprises detecting a real-time temperature T3 of the third refrigeration compartment;

[0014] comparing the real-time temperature T3 of the third refrigeration compartment with a first threshold temperature Ta, Ta < Ts3;

[0015] if T3 < Ta, transferring cold from the third refrigeration compartment to the cold storage device;

[0016] if T3 ≥ Ta, stopping the transferring of cold from the third refrigeration compartment to the cold storage device.

[0017] As a further improvement of the present application, the control method further comprises a step of starting the operation of the refrigeration system;

[0018] controlling the refrigeration system to supply cold to the third refrigeration compartment, or, controlling the refrigeration system to supply cold to the first refrigeration compartment and the third refrigeration compartment.

[0019] As a further improvement of the present application, the control method further comprises a step of detecting a real-time temperature T4 of the cold storage device during the step of transferring cold from the third refrigeration compartment to the cold storage device;

[0020] comparing the real-time temperature T4 of the cold storage device with a second threshold temperature Tb, Tb ≥ Ta;

[0021] if T4 ≥ Tb, maintaining the transferring of cold from the third refrigeration compartment to the cold storage device;

[0022] if T4 < Tb, stopping the transferring of cold from the third refrigeration compartment to the cold storage device, and controlling the refrigeration system to reduce the operation power, or, stopping the operation of the refrigeration system.

[0023] As a further improvement of the present application, the step of transferring cold from the third refrigeration compartment to the cold storage device comprises starting a cold storage fan, introducing air from the third refrigeration compartment into a cold storage chamber in which the cold storage device is placed, and making the air from the third refrigeration compartment into the cold storage chamber flow back to the third refrigeration compartment after completing heat exchange with the cold storage device.

[0024] As a further improvement of the present application, the "controlling the cold quantity transfer system to transfer cold quantity to the first refrigeration chamber and the second refrigeration chamber" means that the cold quantity transfer system simultaneously transfers cold quantity to the first refrigeration chamber and the second refrigeration chamber, or transfers cold quantity to the first refrigeration chamber, and then transfers the cold quantity of the first refrigeration chamber to the second refrigeration chamber.

[0025] As a further improvement of the present application, the control method further comprises determining whether the first temperature difference ΔT1 is greater than or equal to the first preset difference d1 during the process of "transferring the cold quantity of the first refrigeration chamber to the second refrigeration chamber".

[0026] If yes, stop transferring the cold quantity of the first refrigeration chamber to the second refrigeration chamber.

[0027] The present application also provides a refrigeration device operated by the control method as described above.

[0028] The present application has the following advantages: the control method of the refrigeration device of the present application can better ensure the temperature stability of the first refrigeration chamber during operation, and avoid abnormal loss; the refrigeration device can better cope with different use environments without structural changes, is safer and more reliable, and is conducive to the popularization and application of the product. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Fig. 1 is a schematic diagram of the cold quantity flow of an embodiment of the refrigeration device of the present application;

[0030] Figure 2 Fig. 5 is a schematic diagram of the main process of the control method of the refrigeration device of the present application;

[0031] Figure 3 Fig. 7 is a schematic diagram of the cold quantity flow of another embodiment of the refrigeration device of the present application;

[0032] Figure 4 Fig. 8 is a schematic diagram of the cold quantity flow of still another embodiment of the refrigeration device of the present application.

[0033] 101 - first refrigeration chamber; 102 - second refrigeration chamber; 103 - third refrigeration chamber; 104 - cold storage chamber; 201 - refrigeration system; 202 - cold quantity transfer system. DETAILED DESCRIPTION

[0034] The present application will be described in detail below with reference to the embodiments shown in the drawings. However, the embodiments do not limit the present application, and the changes in structure, method, or function made by those skilled in the art based on the embodiments are included in the protection scope of the present application.

[0035] Referring to Fig. 1, the refrigeration device of the present application comprises a first refrigeration chamber 101, a second refrigeration chamber 102, a third refrigeration chamber 103, a cold storage chamber 104, a refrigeration system 201, and a cold quantity transfer system 202. Figure 1As shown, the refrigeration equipment provided by the present application comprises a first refrigeration chamber 101, a second refrigeration chamber 102, a third refrigeration chamber 103 and a cold storage chamber 104. Specifically, the first refrigeration chamber 101 is a refrigeration chamber, the second refrigeration chamber 102 is an operation chamber, and the third refrigeration chamber 103 is a freezing chamber. The cold storage chamber 104 is provided with a cold storage device, which uses a predetermined phase change cold storage material to store cold energy.

[0036] The refrigeration equipment further comprises a refrigeration system 201, a cold energy transfer system 202, and a control system for controlling the operation of the refrigeration system 201 and the cold energy transfer system 202. The refrigeration system 201 generally comprises a refrigeration unit and an evaporator connected to the refrigeration unit, which is used to supply cold to the third refrigeration chamber 103. In practical applications, the evaporator can be provided with a corresponding fan, and the air in the third refrigeration chamber 103 flows through the evaporator under the action of the fan to achieve cooling. The cold energy transfer system 202 comprises a cold carrier pipeline connected to the cold storage device, a cold carrier filled in the cold carrier pipeline, and a circulating pump arranged on the cold carrier pipeline and used to drive the cold carrier to flow in the cold carrier pipeline. Here, the cold energy transfer system 202 further comprises two coolers arranged in the first refrigeration chamber 101 and the second refrigeration chamber 102, respectively, which exchange heat with the cold carrier pipeline to transfer the cold energy stored in the cold storage device to the first refrigeration chamber 101 and the second refrigeration chamber 102; of course, the coolers can also be directly composed of part of the cold carrier pipeline.

[0037] In this embodiment, the refrigeration system 201 only supplies cold to the third refrigeration chamber 103, and a cold storage fan is further arranged between the third refrigeration chamber 103 and the cold storage chamber 104, which is used to transfer the cold energy of the third refrigeration chamber 103 to the cold storage chamber 104. Specifically, the cold storage fan can suck the air in the third refrigeration chamber 103 into the cold storage chamber 104, and the air flowing into the cold storage chamber 104 exchanges heat with the cold storage device and then flows back to the third refrigeration chamber 103 under the action of the cold storage fan.

[0038] The cold storage fan can be arranged in the third refrigeration chamber 103 or in the cold storage chamber 104. In actual work, the air flow entering the cold storage chamber 104 can be controlled by adjusting the rotating speed of the cold storage fan. In particular, when the cold storage fan stops running, only a small amount of cold air enters the cold storage chamber 104, and the cold storage device can be considered to stop cold storage.

[0039] In combination with Figure 2 As shown, the present application provides a control method of the refrigeration equipment, which comprises:

[0040] Starting the refrigeration system 201 to run;

[0041] controlling the refrigeration system 201 to supply cold to the third refrigeration compartment 103;

[0042] transferring cold from the third refrigeration compartment 103 to the cold storage device to perform cold storage;

[0043] controlling the cold transferring system 202 to transfer cold to the first refrigeration compartment 101 and the second refrigeration compartment 102;

[0044] detecting the real-time temperature T1 of the first refrigeration compartment 101;

[0045] calculating the first temperature difference ΔT1 and comparing the first temperature difference ΔT1 with the first preset difference d1, wherein the first temperature difference ΔT1 is the difference between the real-time temperature T1 of the first refrigeration compartment 101 and the set temperature Ts1 of the first refrigeration compartment 101, ΔT1 = T1 - Ts1;

[0046] if ΔT1 ≥ d1, controlling to reduce the transfer of cold to the second refrigeration compartment 102 or to stop the transfer of cold to the second refrigeration compartment 102;

[0047] if ΔT1 < d1, continuing to transfer cold to the first refrigeration compartment 101 and the second refrigeration compartment 102.

[0048] The set temperature Ts3 of the third refrigeration compartment 103 is lower than the set temperature Ts1 of the first refrigeration compartment 101 and the set temperature Ts3 of the third refrigeration compartment 103 is lower than the set temperature Ts2 of the second refrigeration compartment 102. The phase change cold storage material used by the cold storage device can be water, a salt solution of water or other solvents, and the phase change temperature of the phase change cold storage material is set to be higher than the set temperature Ts3 of the third refrigeration compartment to ensure that the cold storage step can be smoothly performed.

[0049] For example, the set temperature Ts3 of the third refrigeration compartment 103 is -18℃, the set temperature Ts1 of the first refrigeration compartment 101 is 4℃, and the set temperature Ts2 of the second refrigeration compartment 102 can be adjusted according to user needs and is usually set to 25-28℃. The phase change temperature of the phase change cold storage material is about -5℃, which also makes the phase change cold storage material have a good heat exchange rate during the cold storage and the cold release process, wherein the cold release process refers to the transfer of cold accumulated in the cold storage device to the first refrigeration compartment 101 and / or the second refrigeration compartment 102 through the cold transferring system 202.

[0050] The "transferring cold energy from the third refrigeration compartment 103 to the cold storage device" specifically includes starting the cold storage fan, introducing the air from the third refrigeration compartment 103 into the cold storage room 104 where the cold storage device is placed, and making the air from the third refrigeration compartment 103 reflow into the third refrigeration compartment 103 after completing heat exchange with the cold storage device.

[0051] The "transferring cold energy to the first refrigeration compartment 101 and the second refrigeration compartment 102" step further includes analyzing and determining the cold energy distribution scheme of the first refrigeration compartment 101 and the second refrigeration compartment 102 according to the first temperature difference ΔT1 and the second temperature difference ΔT2, wherein the second temperature difference ΔT2 is the difference between the real-time temperature T2 of the second refrigeration compartment 102 and the set temperature Ts2 of the second refrigeration compartment 102, ΔT2 = T2-Ts2. The cold energy distribution scheme can be understood as the proportion of cold energy transferred to the first refrigeration compartment 101 and the second refrigeration compartment 102 respectively in the same period. Of course, the determination of the cold energy distribution scheme can also consider other factors such as the space size of the first refrigeration compartment 101 and the second refrigeration compartment 102 according to the actual product design.

[0052] The foregoing cold storage step includes:

[0053] detecting the real-time temperature T3 of the third refrigeration compartment 103;

[0054] comparing the real-time temperature T3 of the third refrigeration compartment 103 with the first threshold temperature Ta, wherein Ta < Ts3;

[0055] if T3 < Ta, transferring the cold energy of the third refrigeration compartment 103 to the cold storage device;

[0056] if T3 ≥ Ta, stopping transferring the cold energy of the third refrigeration compartment 103 to the cold storage device.

[0057] In other words, when the refrigeration system 201 is started, the third refrigeration compartment 103 is preferentially ensured to reach the set temperature Ts3, and the temperature of the freezer compartment is stabilized; then, the cold storage device is cold stored.

[0058] The control method further includes:

[0059] detecting the real-time temperature T4 of the cold storage device during the "transferring cold energy from the third refrigeration compartment 103 to the cold storage device" process;

[0060] comparing the real-time temperature T4 of the cold storage device with the second threshold temperature Tb, Tb ≥ Ta;

[0061] if T4 ≥ Tb, maintaining the transferring of the cold energy of the third refrigeration compartment 103 to the cold storage device;

[0062] If T4 < Tb, stop transferring the cold quantity of the third refrigerating compartment 103 to the cold storage device, and control to reduce the operating power of the refrigeration system 201, or stop the operation of the refrigeration system 201.

[0063] Generally, the second threshold temperature Tb is set to be greater than the first threshold temperature Ta. In actual work, the temperature of the cold storage device, that is, the temperature of the cold storage chamber 104, will be lower than the temperature of the third refrigerating compartment 103. Mainly when the temperatures of the two are close, the heat exchange efficiency of the cold storage device for cold storage is relatively low. Continuing the cold storage step will also cause the temperature of the third refrigerating compartment 103 to further decrease, which is not conducive to maintaining its temperature stability and will also increase energy consumption.

[0064] The "control the cold quantity transfer system 202 to transfer cold quantity to the first refrigerating compartment 101 and the second refrigerating compartment 102" means transferring cold quantity to the first refrigerating compartment 101 and the second refrigerating compartment 102 simultaneously, or transferring cold quantity to the first refrigerating compartment 101 and then transferring the cold quantity in the first refrigerating compartment 101 to the second refrigerating compartment 102. In the above embodiments, coolers are provided in both the first refrigerating compartment 101 and the second refrigerating compartment 102. The cold quantity transfer system 202 can supply cold to the two cooling chambers simultaneously according to the cold quantity distribution scheme to achieve the temperature reduction of the first refrigerating compartment 101 and the second refrigerating compartment 102.

[0065] As Figure 3 shown, in another embodiment of the present application, the cooler of the cold quantity transfer system 202 is only provided in the first refrigerating compartment 101, that is, the refrigerating chamber, and there is also a air supply device between the refrigerating chamber and the operation chamber. That is to say, the cold quantity transfer system 202 can only directly transfer the cold quantity stored in the cold storage device into the first refrigerating compartment 101, and then transfer a part of the cold quantity in the first refrigerating compartment 101 to the second refrigerating compartment 102 according to the demand of the second refrigerating compartment 102. With the above design, the manufacturing cost and assembly difficulty of the cold quantity transfer system 202 can be reduced, and it is also more convenient to control.

[0066] Here, the control method further includes comparing the first temperature difference ΔT1 with the first preset difference d1 during the process of transferring the cold quantity in the first refrigerating compartment 101 to the second refrigerating compartment 102;

[0067] If ΔT1 < d1, continue to transfer cold quantity to the second refrigerating compartment 102;

[0068] If ΔT1 ≥ d1, stop transferring the cold quantity in the first refrigerating compartment 101 to the second refrigerating compartment 102, that is, give priority to ensuring the temperature stability of the first refrigerating compartment 101.

[0069] As Figure 4As shown in another embodiment of the present application, the difference from the above-mentioned embodiments is that the refrigeration system 201 also has an evaporator for supplying cold to the first refrigeration compartment 101, that is, the refrigeration system 201 can supply cold to the first refrigeration compartment 101 and the third refrigeration compartment 103 at the same time. Similarly, the cold transfer system 202 can transfer the cold stored by the cold storage device to the first refrigeration compartment 101 and the second refrigeration compartment 102 at the same time, or only to the first refrigeration compartment 101, which will not be described here.

[0070] In summary, the control method of the refrigeration equipment of the present application can better ensure the temperature stability of the first refrigeration compartment 101 during operation, and can avoid abnormal loss caused by over-temperature of the first refrigeration compartment 101 to the greatest extent. The refrigeration equipment 100 uses the cold storage device for peak-shifting cold storage, which can reduce the power and cost of the refrigeration system 201, and can better cope with different use environments, and is more safe and reliable, which is beneficial to the popularization and application of the product.

[0071] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0072] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A control method of a refrigeration apparatus, characterized by: The method comprises the following steps: transferring the cold energy accumulated in the cold storage device to the first refrigeration chamber and the second refrigeration chamber; detecting the real-time temperature T1 of the first refrigeration chamber; comparing the first temperature difference ΔT1 with the first preset difference d1, wherein the first temperature difference ΔT1 is the difference between the real-time temperature T1 of the first refrigeration chamber and the set temperature Ts1 of the first refrigeration chamber, ΔT1=T1-Ts1; if ΔT1≥d1, reducing the transfer of cold energy to the second refrigeration chamber, or stopping the transfer of cold energy to the second refrigeration chamber; if ΔT1 The control method further comprises the following steps of cold storage of the cold storage device: detecting the real-time temperature T3 of the third refrigeration chamber, the set temperature Ts3 of the third refrigeration chamber being less than the set temperature Ts1 of the first refrigeration chamber, and the set temperature Ts3 of the third refrigeration chamber being less than the set temperature Ts2 of the second refrigeration chamber; comparing the real-time temperature T3 of the third refrigeration chamber with the first threshold temperature Ta, Ta The control method further comprises the following steps of starting the refrigeration system: controlling the refrigeration system to supply cold to the third refrigeration chamber, or controlling the refrigeration system to supply cold to the first refrigeration chamber and the third refrigeration chamber; detecting the real-time temperature T4 of the cold storage device during the transfer of the cold energy of the third refrigeration chamber to the cold storage device; comparing the real-time temperature T4 of the cold storage device with the second threshold temperature Tb, Tb≥Ta; if T4≥Tb, maintaining the transfer of the cold energy of the third refrigeration chamber to the cold storage device; if T4 2. The control method of a refrigerating appliance according to claim 1, characterized in that: The transfer of the cold energy of the third refrigeration chamber to the cold storage device comprises starting the cold storage fan, introducing the air of the third refrigeration chamber into the cold storage chamber where the cold storage device is placed, and making the air from the third refrigeration chamber into the cold storage chamber flow back to the third refrigeration chamber after completing heat exchange with the cold storage device.

3. The control method of a refrigerating appliance according to claim 1, characterized in that: The control of the cold energy transfer system to transfer cold energy to the first refrigeration chamber and the second refrigeration chamber means that the cold energy transfer system simultaneously transfers cold energy to the first refrigeration chamber and the second refrigeration chamber, or transfers cold energy to the first refrigeration chamber, and then transfers the cold energy of the first refrigeration chamber to the second refrigeration chamber.

4. The control method of a refrigerating appliance according to claim 3, characterized in that: The control method further comprises the following steps of determining whether the first temperature difference ΔT1 is greater than or equal to the first preset difference d1 during the transfer of the cold energy of the first refrigeration chamber to the second refrigeration chamber. If yes, the transfer of the cold energy of the first refrigeration chamber to the second refrigeration chamber is stopped.

5. A refrigeration appliance characterized by: The refrigeration device is operated by the control method of the refrigeration device according to any one of claims 1-4.

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