Refrigerating unit and control method thereof

Abstract

The invention discloses a refrigerating unit and a control method thereof, and the refrigerating unit comprises a heating assembly of the refrigerating unit; the heat exchange box is filled with a secondary refrigerant; the heat dissipation circulation pipeline is connected with the heating assembly and the heat exchange box and used for dissipating heat of the heating assembly through the secondary refrigerant in the heat exchange box; and the defrosting circulating pipeline is connected with the heat exchange box and the evaporator of the refrigerating unit and is used for defrosting the evaporator by adopting the secondary refrigerant in the heat exchange box. The problem that in the prior art, the energy consumption of a refrigerating unit is high is solved, the energy consumption needed by defrosting and heat dissipation of the heating assembly is reduced, and the energy efficiency and operation reliability of the refrigerating unit are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a refrigeration unit and a control method thereof. Background Art

[0002] The quick freezer is a highly efficient freezing device that can freeze a large amount of products in a short time. The quick freezer is large in size, up to 30 meters long, and has a low refrigeration temperature, so the evaporator has a high amount of frost.

[0003] At present, the most common defrosting method for refrigeration units, especially quick freezers, is water defrosting, which consumes a lot of energy. After water defrosting, water and ice cubes are directly discharged into the warehouse, causing great waste and high cost. In addition, quick freezers have high loads and work almost non-stop. Therefore, the electric control box and the motor of the conveyor belt device of the quick freezer generate a lot of heat, which needs to be dissipated in time. The main way of heat dissipation is fan heat dissipation, which has a high failure rate and is not energy-saving.

[0004] With regard to the problem of high energy consumption of refrigeration units in related technologies, no effective solution has been proposed so far. Summary of the invention

[0005] The present invention provides a refrigeration unit and a control method thereof, so as to at least solve the problem of high energy consumption of the refrigeration unit in the prior art.

[0006] To solve the above technical problems, according to one aspect of an embodiment of the present invention, a refrigeration unit is provided, comprising: a heating component of the refrigeration unit; a heat exchange box, wherein the heat exchange box is filled with a refrigerant; a heat dissipation circulation pipeline connected to the heating component and the heat exchange box, and used to use the refrigerant in the heat exchange box to dissipate heat for the heating component; a defrost circulation pipeline connected to the heat exchange box and an evaporator of the refrigeration unit, and used to use the refrigerant in the heat exchange box to defrost the evaporator.

[0007] Furthermore, it also includes: a refrigeration cycle pipeline, connected to the condenser and the evaporator of the refrigeration unit; wherein the refrigerant is used for heat exchange in the refrigeration cycle pipeline; a bypass pipeline, a first end of the bypass pipeline is connected to a first connection point on the pipeline between the refrigerant outlet of the evaporator and the refrigerant inlet of the condenser, and a second end of the bypass pipeline is connected to the heat exchange box, for passing the refrigerant at the refrigerant outlet of the evaporator into the heat exchange box.

[0008] Furthermore, it also includes: an electric heating device connected to the defrost circulation pipeline, and used for heating the refrigerant in the defrost circulation pipeline.

[0009] Furthermore, the heat exchange box includes: a first refrigerant outlet, a first refrigerant inlet, a second refrigerant outlet, and a second refrigerant inlet, wherein one end of the heat dissipation circulation pipeline is connected to the first refrigerant outlet, and the other end is connected to the first refrigerant inlet, and the heat dissipation circulation pipeline passes through the heating component to exchange heat with the heat exchange component; one end of the defrost circulation pipeline is connected to the second refrigerant outlet, and the other end is connected to the second refrigerant inlet, and the defrost circulation pipeline passes through the evaporator to exchange heat with the evaporator; the second end of the bypass pipeline is connected to a second connection point on the pipeline between the evaporator and the second refrigerant inlet.

[0010] Furthermore, it also includes: a first control valve, located on the defrost circulation pipeline, for controlling the on-off of the defrost circulation pipeline; a second control valve, located on the bypass pipeline, for controlling the on-off of the bypass pipeline; a third control valve, located on the refrigeration circulation pipeline, for controlling the on-off of the refrigeration circulation pipeline; a throttling device, located on the pipeline between the second refrigerant inlet and the second connection point, for controlling the refrigerant flow rate of the defrost circulation pipeline and the bypass pipeline.

[0011] Furthermore, the heating component includes at least one of the following: an electrical control box, a motor; the refrigeration unit also includes: a first circulation pump, located on the heat dissipation circulation pipeline, for providing power for the refrigerant to circulate in the heat dissipation circulation pipeline; a second circulation pump, located on the defrost circulation pipeline, for providing power for the refrigerant to circulate in the defrost circulation pipeline; a third circulation pump, located on the refrigeration circulation pipeline, for providing power for the refrigerant to circulate in the refrigeration circulation pipeline; a heating component temperature sensor, located on the heating component, for detecting the temperature of the heating component; a defrost water temperature sensor, located at the place where the defrost circulation pipeline enters the evaporator, for detecting the temperature of the defrost water entering the evaporator; a defrost temperature sensor, located at the place where the defrost circulation pipeline flows out of the evaporator, for detecting the temperature of the refrigerant flowing out of the evaporator from the defrost circulation pipeline as the defrost temperature.

[0012] According to another aspect of an embodiment of the present invention, a refrigeration unit control method is provided, which is applied to a refrigeration unit as described above, and the method comprises: detecting whether an evaporator of the refrigeration unit needs to be defrosted; when defrosting is required, using a defrost circulation pipeline to defrost the evaporator; when defrosting is not required, using a heat dissipation circulation pipeline to dissipate heat from a heating component of the refrigeration unit.

[0013] Furthermore, the use of a defrost circulation pipeline to defrost the evaporator includes: controlling the refrigeration circulation pipeline to be disconnected, connecting the defrost circulation pipeline and the heat dissipation circulation pipeline, controlling the opening of the throttling device to a maximum opening, and using the heat of the heating component to defrost the evaporator.

[0014] Furthermore, after controlling the opening of the throttling device to be adjusted to the maximum opening, it also includes: detecting the defrost water temperature, and controlling the electric heating device to heat the refrigerant in the defrost circulation pipeline according to the defrost water temperature; wherein, when the defrost water temperature is lower than a first preset temperature, controlling the electric heating device to turn on until the defrost is completed; detecting the defrost temperature, determining whether the defrost is completed according to the defrost temperature, and controlling the defrost circulation pipeline to be disconnected after the defrost is completed, the refrigeration circulation pipeline and the heat dissipation circulation pipeline to be connected, and the throttling device to be closed; wherein, when the defrost temperature is greater than or equal to a second preset temperature, it is determined that the defrost is completed.

[0015] Furthermore, a heat dissipation circulation pipeline is used to dissipate heat for the heating component of the refrigeration unit, including: detecting the temperature of the heating component; judging whether the heat dissipation circulation pipeline meets the heat dissipation demand of the heating component according to the temperature of the heating component; if so, continuing to use the heat dissipation circulation pipeline to dissipate heat for the heating component of the refrigeration unit; otherwise, using the heat dissipation circulation pipeline and the bypass pipeline to dissipate heat for the heating component of the refrigeration unit.

[0016] Furthermore, judging whether the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component according to the temperature of the heat dissipation component includes: judging whether the temperature of the electric control box or the temperature of the motor is less than or equal to a third preset temperature, and if so, determining that the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component; otherwise, determining that the heat dissipation circulation pipeline does not meet the heat dissipation demand of the heat dissipation component; using the heat dissipation circulation pipeline and the bypass pipeline to dissipate heat for the heat dissipation of the heat dissipation component of the refrigeration unit, including: controlling the second control valve of the bypass pipeline to open, detecting the temperature of the electric control box and the temperature of the motor; and controlling the opening of the throttling device according to the larger of the temperature of the electric control box and the temperature of the motor.

[0017] According to another aspect of an embodiment of the present invention, there is provided a storage medium comprising computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned refrigeration unit control method when executed by a computer processor.

[0018] In the present invention, a refrigerating unit is provided, the refrigerating unit is provided with a heat dissipation circulation pipeline, the heat dissipation circulation pipeline exchanges heat with a heating component through a heat exchange box, dissipates heat to the heating component, and reduces the temperature of the heating component. At the same time, the refrigerating unit also includes a defrosting circulation pipeline, and the defrosting circulation pipeline uses a refrigerant in the heat exchange box to defrost the evaporator. Since the heat dissipation circulation pipeline and the defrosting circulation pipeline are connected through the heat exchange box, the heating components of the refrigerating unit, such as an electric control box and a conveyor belt motor, are combined with the evaporator of the refrigerating unit, and the heat dissipated by the electric control box and the motor is used to accelerate the defrosting of the evaporator. At the same time, the cold energy of defrosting is used to dissipate the heat of the electric control box and the motor, so as to realize the utilization of the cold energy of defrosting of the refrigerating unit, reduce the energy consumption required for defrosting and heat dissipation of the heating components, and effectively solve the problems of waste of defrosting water, high cost, non-environmental protection, and high heat dissipation energy consumption of traditional quick-freezing machines. In addition, the defrosting cold energy controls the temperature of the electric control box and the motor within a suitable temperature range, thereby improving the operating reliability of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an optional structural schematic diagram of a refrigeration unit according to an embodiment of the present invention;

[0020] Figure 2 is an optional flow chart of a refrigeration unit control method according to an embodiment of the present invention;

[0021] Figure 3 is another optional flow chart of a refrigeration unit control method according to an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Heat exchange box; 2. Electric control box; 3. Motor; 4. Evaporator; 5. Condenser; 6. Electric heating device; 7. Throttling device; 8. First control valve; 9. Second control valve; 10. Third control valve; 11. Fourth control valve; 12. First circulation pump; 13. Second circulation pump; 14. Third circulation pump; 151. Electric control box temperature sensing package; 152. Motor temperature sensing package; 16. Defrost water temperature sensing package; 17. Defrost temperature sensing package. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0026] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] It should be understood that although the terms first, second, third, etc. may be used to describe controllers in embodiments of the present invention, these controllers should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of embodiments of the present invention, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller.

[0028] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0029] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0030] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] In a preferred embodiment 1 of the present invention, a refrigeration unit is provided. Specifically, Figure 1 An optional structural schematic diagram of the refrigeration unit is shown, such as Figure 1 As shown, the refrigeration unit includes:

[0033] The heating component of the refrigeration unit includes at least one of the following: an electric control box 2 and a motor 3;

[0034] like Figure 1 As shown, the electric control box 2 is connected in parallel with the motor 3. If the refrigeration unit has other heat generating components that need to dissipate heat, they can be connected in parallel or in series with the electric control box 2 and the motor 3;

[0035] The heat exchange box 1 is filled with a coolant;

[0036] In a preferred embodiment of the present invention, the coolant can be water, so the heat exchange box 1 is a water tank, and there is water in the water tank for heat exchange;

[0037] The heat dissipation circulation pipeline is connected to the heat generating component and the heat exchange box 1, and is used to use the coolant in the heat exchange box 1 to dissipate heat for the heat generating component;

[0038] The defrost circulation pipeline is connected to the heat exchange box 1 and the evaporator 4 of the refrigeration unit, and is used to use the refrigerant in the heat exchange box 1 to defrost the evaporator 4. That is, the defrost circulation pipeline also has a refrigerant, which is connected to the heat exchange box 1, and the refrigerant flowing in the heat exchange box 1, the heat dissipation circulation pipeline and the defrost circulation pipeline realizes heat transfer.

[0039] In the above embodiment, a refrigeration unit is provided, which is provided with a heat dissipation circulation pipeline, which exchanges heat with the heating component through a heat exchange box, dissipates heat to the heating component, and reduces the temperature of the heating component. At the same time, the refrigeration unit also includes a defrosting circulation pipeline, which uses the refrigerant in the heat exchange box to defrost the evaporator. Since the heat dissipation circulation pipeline and the defrosting circulation pipeline are connected through the heat exchange box, the heating components of the refrigeration unit, such as the electric control box and the conveyor motor, are combined with the evaporator of the refrigeration unit, and the heat dissipated by the electric control box and the motor is used to accelerate the defrosting of the evaporator. At the same time, the cold energy of defrosting is used to dissipate the heat of the electric control box and the motor, so as to realize the utilization of the cold energy of defrosting of the refrigeration unit, reduce the energy consumption required for defrosting and heat dissipation of the heating components, and effectively solve the problems of waste of defrosting water, high cost, environmental protection and high heat dissipation energy consumption of traditional quick freezers. In addition, the defrosting cold energy controls the temperature of the electric control box and the motor within a suitable temperature range, thereby improving the operating reliability of the unit.

[0040] like Figure 1As shown, the refrigeration unit also includes: a refrigeration cycle pipeline, which is connected to the condenser 5 and the evaporator 4 of the refrigeration unit; wherein a refrigerant is used for heat exchange in the refrigeration cycle pipeline; that is, a refrigerant is also used for heat exchange in the refrigeration unit of the present invention, which is the same as the refrigerant in the heat exchange box 1. Based on the same refrigerant, the refrigeration unit can be provided with a bypass pipeline, and the first end of the bypass pipeline is connected to the first connection point on the pipeline between the refrigerant outlet of the evaporator 4 and the refrigerant inlet of the condenser 5, and the second end of the bypass pipeline is connected to the heat exchange box 1. Therefore, the refrigerant in the refrigeration cycle pipeline of the refrigeration unit can be bypassed to the heat exchange box 1, so that the normal refrigeration cold capacity utilization of the refrigeration unit is realized, and its cold capacity is used to dissipate heat for the heat-generating components, thereby reducing the energy consumption required for heat dissipation.

[0041] In addition, the refrigeration unit also includes: an electric heating device 6, which is connected to the defrost circulation pipeline and is used to heat the refrigerant in the defrost circulation pipeline. Since the refrigeration unit is prone to severe frost, the defrosting heat requirement is relatively high. Therefore, in order to achieve thorough defrosting, the electric heating device 6 is set. When the heat of the heating component cannot meet the defrosting demand, the electric heating device 6 is turned on to defrost the evaporator 4, meet the defrosting demand of the refrigeration unit, and ensure the stability of the unit operation.

[0042] Preferably, the heat exchange box 1 comprises: a first refrigerant outlet, a first refrigerant inlet, a second refrigerant outlet, and a second refrigerant inlet, wherein one end of the heat dissipation circulation pipeline is connected to the first refrigerant outlet, and the other end is connected to the first refrigerant inlet, and the heat dissipation circulation pipeline passes through the heating component to exchange heat with the heat exchange component; one end of the defrost circulation pipeline is connected to the second refrigerant outlet, and the other end is connected to the second refrigerant inlet, and the defrost circulation pipeline passes through the evaporator 4 to exchange heat with the evaporator 4; the second end of the bypass pipeline is connected to the second connection point on the pipeline between the evaporator 4 and the second refrigerant inlet. As mentioned above, the heat dissipation circulation pipeline, the defrost circulation pipeline, the refrigeration circulation pipeline, and the bypass pipeline all use refrigerant for heat exchange. In order to achieve higher heat exchange efficiency, the circulation pipeline and the bypass pipeline are both connected to the refrigerant in the heat exchange box 1, that is, refrigerants of different temperatures exchange heat in the heat exchange box 1, providing a buffer for heat transfer.

[0043] The evaporator 4, the electric control box 2 and the conveyor belt motor 3 are combined together through the refrigerant system, and the refrigerant circulation is used to dissipate the heat of the electric control box 2 and the motor 3. The heat dissipated by the electric control box 2 and the motor 3 is combined with electric heating to defrost the unit.

[0044] In order to realize the control of different heat exchange modes, the refrigeration unit of the present invention also includes: a first control valve 8, located on the defrost circulation pipeline, used to control the on-off of the defrost circulation pipeline; a second control valve 9, located on the bypass pipeline, used to control the on-off of the bypass pipeline; a third control valve 10, located on the refrigeration circulation pipeline, used to control the on-off of the refrigeration circulation pipeline; optionally, there can be two third control valves on the refrigeration circulation pipeline, respectively located on the pipeline from the evaporator to the condenser and the pipeline from the condenser to the evaporator. Figure 1 As shown, a fourth control valve 11 may be further provided on the pipeline between the evaporator 4 and the second refrigerant inlet. In addition, a throttling device 7 is also included, which is located on the pipeline between the second refrigerant inlet and the second connection point, and is used to control the refrigerant flow of the defrost circulation pipeline and the bypass pipeline. The throttling device 7 is used to control the flow of the two pipelines, thereby controlling the flow of defrosting and bypass, and performing flow control according to the heat dissipation demand and defrosting, that is, achieving precise heat dissipation and precise defrosting, and improving the heat dissipation and defrosting effects.

[0045] In addition, the refrigeration unit further includes: a first circulation pump 12, located on the heat dissipation circulation pipeline, used to provide power for the refrigerant to circulate in the heat dissipation circulation pipeline; a second circulation pump 13, located on the defrost circulation pipeline, used to provide power for the refrigerant to circulate in the defrost circulation pipeline; a third circulation pump 14, located on the refrigeration circulation pipeline, used to provide power for the refrigerant to circulate in the refrigeration circulation pipeline; a heating component temperature sensing package, located on the heating component, used to detect the temperature of the heating component; a defrost water temperature sensing package 16, located at the defrost circulation pipeline entering the evaporator 4, used to detect the defrost water temperature entering the evaporator 4; a defrost temperature sensing package 17, located at the defrost circulation pipeline flowing out of the evaporator 4, used to detect the refrigerant temperature flowing out of the evaporator 4 from the defrost circulation pipeline as the defrost temperature. By controlling the refrigerant flow rate in the circulation pipeline by the water pump, the heat exchange efficiency can be improved and rapid heat exchange can be achieved. At the same time, the defrost temperature detected by the temperature sensing package can be used to control the defrost process, and the defrost water temperature can be used to determine the defrost effect to determine whether to turn on the electric heating to achieve complete defrost.

[0046] The present invention uses the coldness of defrost water for heat dissipation, fully utilizes the defrost water to dissipate heat for the unit, and simultaneously utilizes the heat of the electric control box and the motor to defrost the unit, thereby achieving energy saving and environmental protection as well as reducing energy consumption, and at the same time controls the start of electric heating through temperature judgment to ensure the defrosting effect.

[0047] Example 2

[0048] In a preferred embodiment 2 of the present invention, a refrigeration unit control method is provided, which is applied to the refrigeration unit in the above-mentioned embodiment 1.

[0049] Specifically, Figure 2 An optional flow chart of the method is shown as follows: Figure 2As shown, the method includes the following steps S202-S206:

[0050] S202: Detect whether the evaporator of the refrigeration unit needs to be defrosted;

[0051] S204: When defrosting is required, the defrosting circulation pipeline is used to defrost the evaporator;

[0052] S206: When defrosting is not required, a heat dissipation circulation pipeline is used to dissipate heat for the heating components of the refrigeration unit.

[0053] In the above embodiment, a refrigerating unit is provided, which is provided with a heat dissipation circulation pipeline, which exchanges heat with the heating component through a heat exchange box, dissipates heat to the heating component, and reduces the temperature of the heating component. At the same time, the refrigerating unit also includes a defrosting circulation pipeline, which uses the refrigerant in the heat exchange box to defrost the evaporator. Since the heat dissipation circulation pipeline and the defrosting circulation pipeline are connected through the heat exchange box, the heating components of the refrigerating unit, such as the electric control box and the conveyor motor, are combined with the evaporator of the refrigerating unit, and the heat dissipated by the electric control box and the motor is used to accelerate the defrosting of the evaporator, which effectively solves the problems of waste of defrosting water, high cost, environmental pollution and high heat dissipation energy consumption of traditional quick freezers. At the same time, the cold energy of defrosting is used to dissipate the heat of the electric control box and the motor, so as to realize the utilization of the defrosting cold energy of the refrigerating unit, reduce the energy consumption required for defrosting and heat dissipation of the heating components, and the defrosting cold energy controls the temperature of the electric control box and the motor within a suitable temperature range, thereby improving the operating reliability of the unit.

[0054] In a preferred embodiment of the present invention, the defrost circulation pipeline is used to defrost the evaporator, including: controlling the refrigeration circulation pipeline to be disconnected, the defrost circulation pipeline and the heat dissipation circulation pipeline to be connected, controlling the opening of the throttling device to be adjusted to the maximum opening, and using the heat of the heating component to defrost the evaporator. When the unit is defrosted, more defrost water is generated due to water flushing, and the defrost cooling capacity can also be used at the same time. At this time, the second control valve and the third control valve are closed, the refrigeration circulation pipeline is disconnected, the throttling device is opened to the maximum, the first control valve is opened, and the defrost circulation pipeline and the heat dissipation circulation pipeline are connected together. At this time, the evaporator of the refrigeration circulation pipeline and the heat dissipation circulation pipeline are connected together through the middle water tank, and defrosting is performed through the refrigerant in the water tank.

[0055] Preferably, after controlling the opening of the throttling device to be adjusted to the maximum opening, it also includes: detecting the defrost water temperature, and controlling the electric heating device to heat the refrigerant in the defrost circulation pipeline according to the defrost water temperature; wherein, when the defrost water temperature is lower than the first preset temperature, controlling the electric heating device to turn on until the defrost is completed; detecting the defrost temperature, determining whether the defrost is completed according to the defrost temperature, and controlling the defrost circulation pipeline to be disconnected, the refrigeration circulation pipeline and the heat dissipation circulation pipeline to be connected, and the throttling device to be closed after the defrost is completed; wherein, when the defrost temperature is greater than or equal to the second preset temperature, it is determined that the defrost is completed.

[0056] When the defrost water temperature t 化 <t2, it means that defrosting cannot be completed by relying on the heat in the water tank. At this time, it is necessary to turn on the electric heating device to heat the refrigerant until defrosting is completed; when t 化 ≥t2, the electric heating is turned off (in a defrost cycle, if the electric heating is turned on, it will continue until the defrost is completed).

[0057] When the defrost temperature is ≥ t3, the defrost ends and the unit enters the normal refrigeration state. The electric heating, the first control valve and the throttling device are closed, and the second control valve and the third control valve are opened.

[0058] Through the control of this step, the coldness of the defrost water is used for heat dissipation, and the defrost water is fully utilized to dissipate heat for the unit. At the same time, the heat from the electric control box and the motor is used to defrost the unit, thereby achieving energy saving, environmental protection and reducing energy consumption. At the same time, the electric heating is controlled to start through temperature judgment to ensure the defrosting effect.

[0059] In another preferred embodiment of the present invention, a heat dissipation circulation pipeline is used to dissipate heat for the heating component of the refrigeration unit, including: detecting the temperature of the heating component; judging whether the heat dissipation circulation pipeline meets the heat dissipation demand of the heating component according to the temperature of the heating component; if yes, continuing to use the heat dissipation circulation pipeline to dissipate heat for the heating component of the refrigeration unit; otherwise, using the heat dissipation circulation pipeline and the bypass pipeline to dissipate heat for the heating component of the refrigeration unit. Figure 1 As shown, the refrigeration unit can be provided with a bypass pipeline, the first end of the bypass pipeline is connected to the first connection point on the pipeline between the refrigerant outlet of the evaporator and the refrigerant inlet of the condenser, and the second end of the bypass pipeline is connected to the heat exchange box. Therefore, the refrigerant in the refrigeration cycle pipeline of the refrigeration unit can be bypassed to the heat exchange box, so as to realize the normal refrigeration cold capacity utilization of the refrigeration unit, and use its cold capacity to dissipate heat for the heat-generating components, thereby reducing the energy consumption required for heat dissipation.

[0060] Specifically, judging whether the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component according to the temperature of the heat dissipation component, including: judging whether the temperature of the electric control box or the temperature of the motor is less than or equal to the third preset temperature, if so, determining that the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component, otherwise, determining that the heat dissipation circulation pipeline does not meet the heat dissipation demand of the heat dissipation component; using the heat dissipation circulation pipeline and the bypass pipeline to dissipate heat for the heat dissipation of the heat dissipation component of the refrigeration unit, including: controlling the second control valve of the bypass pipeline to open, detecting the temperature of the electric control box and the temperature of the motor; controlling the opening of the throttling device according to the larger of the temperature of the electric control box and the temperature of the motor.

[0061] When the unit is running, the temperature of the electric control box is 电控 ≤t1-5 or motor temperature t 电机≤t1-5, indicating that the temperature of the electric control box and the motor can be kept below the set temperature by relying on the heat dissipation circulation pipeline. At this time, the defrost circulation pipeline, bypass pipeline and throttling device of the unit are closed, and the other control valves are opened; the refrigeration circulation pipeline is refrigerating normally, and the refrigerant circulates between the condenser and the evaporator of the refrigeration unit for refrigeration; the heat dissipation circulation pipeline connects the electric control box, the motor and the water tank, and the refrigerant circulates between the two. The heat dissipated by the electric control box and the motor is slowly stored in the refrigerant in the entire cycle.

[0062] When the temperature of the electric control box t 电控 >t1-5 or motor temperature t 电机 >t1-5, the throttling device opens and adjusts the size of the throttling device according to the maximum value of the electric control box temperature or the motor temperature.

[0063] When the temperature of the electric control box t 电控 >t1-5 or motor temperature t 电机 >t1-5, indicating that the temperature of the electric control box and the motor cannot be reduced to below the set temperature by relying solely on the heat dissipation circulation pipeline. It is necessary to connect the refrigeration circulation pipeline and the heat dissipation circulation pipeline to a limited extent. The throttling device is controlled by the temperature of the electric control box or the motor. Part of the low-temperature coolant is extracted from the refrigeration circulation pipeline and added to the heat dissipation circulation pipeline to cool the electric control box and the motor. The specific control is as follows:

[0064] The opening of the throttling device (1-100%) is controlled by the controller, and its input parameter is the temperature of the electric control box t 电控 and motor temperature t 电机 ;

[0065] When t 电控 or 电机 When ≤t1, the opening of the throttling device decreases;

[0066] When t1<t 电控 or 电机 ≤t1+5, the opening of the throttling device remains unchanged;

[0067] When t 电控 or 电机 >t1+5, the opening of the throttling device increases.

[0068] Through the intelligent control of the temperature of the electric control box and the motor, the connection of the refrigeration circulation pipeline and the heat dissipation circulation pipeline, as well as the opening and opening degree of the throttling device, the electric control box and the motor are cooled, the reliability of the unit is improved, the use of fans for heat dissipation is avoided to reduce energy consumption, and the 5°C accuracy is set to avoid frequent opening or closing of the throttling device, thereby protecting the throttling device.

[0069] Another refrigeration unit control method is provided in a preferred embodiment 2 of the present invention. Specifically, Figure 3An optional flow chart of the method is shown as follows: Figure 3 As shown, the method includes the following steps S301-S308:

[0070] S301: The unit is running, the first circulating pump and the third circulating pump are running normally, and the first control valve and the second control valve are closed;

[0071] S302: Detecting the temperature of the electric control box t 电控 >t1-5 or motor temperature t 电机 >Whether t1-5 is established, if yes, go to step S303, otherwise return to S301;

[0072] S303: The throttling device is turned on and adjusted according to the maximum value of the electric control box temperature and the motor temperature;

[0073] S304: The unit defrosts, the second circulation pump operates normally, and the second control valve and the third control valve are closed;

[0074] S305: Check whether the defrost water temperature is greater than t2, if so, proceed to step S306, otherwise proceed to step S307;

[0075] S306: The throttling device is opened to the maximum, and the first control valve is opened;

[0076] S307: The throttling device is opened to the maximum, the first control valve is opened, and the electric heating is turned on;

[0077] S308: When the defrosting temperature is detected to be greater than t3, the defrosting ends, the electric heating and the first control valve are closed, and the third control valve is opened.

[0078] In the above implementation, the connection of the refrigeration cycle pipeline and the heat dissipation cycle pipeline as well as the opening and opening degree of the throttling device are intelligently controlled by the temperature of the electric control box and the motor, so as to cool down the electric control box and the motor, improve the reliability of the unit, avoid using the fan to dissipate heat and reduce energy consumption, and set the 5°C accuracy to avoid frequent opening or closing of the throttling device, so as to protect the throttling device. At the same time, the coldness of the defrost water is used for heat dissipation, and the defrost water is fully utilized to dissipate heat for the unit, and the heat of the electric control box and the motor is used to defrost the unit, so as to achieve energy saving, environmental protection and reduce energy consumption, and at the same time, the electric heating is controlled to be turned on by temperature judgment to ensure the defrosting effect.

[0079] Example 3

[0080] Based on the refrigeration unit control method provided in the above-mentioned embodiment 2, a storage medium containing computer executable instructions is also provided in a preferred embodiment 3 of the present invention. When the computer executable instructions are executed by a computer processor, they are used to execute the refrigeration unit control method as described above.

[0081] In the above embodiment, a refrigeration unit is provided, which is provided with a heat dissipation circulation pipeline, which exchanges heat with the heating component through a heat exchange box, dissipates heat to the heating component, and reduces the temperature of the heating component. At the same time, the refrigeration unit also includes a defrosting circulation pipeline, which uses the refrigerant in the heat exchange box to defrost the evaporator. Since the heat dissipation circulation pipeline and the defrosting circulation pipeline are connected through the heat exchange box, the heating components of the refrigeration unit, such as the electric control box and the conveyor motor, are combined with the evaporator of the refrigeration unit, and the heat dissipated by the electric control box and the motor is used to accelerate the defrosting of the evaporator. At the same time, the cold energy of defrosting is used to dissipate the heat of the electric control box and the motor, so as to realize the utilization of the cold energy of defrosting of the refrigeration unit, reduce the energy consumption required for defrosting and heat dissipation of the heating components, and effectively solve the problems of waste of defrosting water, high cost, environmental protection and high heat dissipation energy consumption of traditional quick freezers. In addition, the defrosting cold energy controls the temperature of the electric control box and the motor within a suitable temperature range, thereby improving the operating reliability of the unit.

[0082] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0083] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0085] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0086] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0087] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0088] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not invented by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0089] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A refrigeration unit, characterized in that: include: The heating component of the refrigeration unit; A heat exchange box, wherein a coolant is contained in the heat exchange box; A heat dissipation circulation pipeline is connected to the heat generating component and the heat exchange box, and is used to use the coolant in the heat exchange box to dissipate heat for the heat generating component; The defrost circulation pipeline is connected to the heat exchange box and the evaporator of the refrigeration unit, and is used for defrosting the evaporator by using the refrigerant in the heat exchange box.

2. The refrigerating unit according to claim 1, characterized in that: Also includes: A refrigeration cycle pipeline is connected to the condenser and the evaporator of the refrigeration unit; wherein the refrigerant is used for heat exchange in the refrigeration cycle pipeline; A bypass pipeline, wherein the first end of the bypass pipeline is connected to a first connection point on the pipeline between the evaporator refrigerant outlet and the condenser refrigerant inlet, and the second end of the bypass pipeline is connected to the heat exchange box, for passing the refrigerant at the evaporator refrigerant outlet into the heat exchange box.

3. The refrigerating unit according to claim 1, characterized in that: Also includes: The electric heating device is connected to the defrost circulation pipeline and is used for heating the coolant in the defrost circulation pipeline.

4. The refrigerating unit according to claim 2, characterized in that: The heat exchange box includes: a first refrigerant outlet, a first refrigerant inlet, a second refrigerant outlet, and a second refrigerant inlet, wherein one end of the heat dissipation circulation pipeline is connected to the first refrigerant outlet, and the other end is connected to the first refrigerant inlet, and the heat dissipation circulation pipeline passes through the heating component to exchange heat with the heat exchange component; one end of the defrost circulation pipeline is connected to the second refrigerant outlet, and the other end is connected to the second refrigerant inlet, and the defrost circulation pipeline passes through the evaporator to exchange heat with the evaporator; the second end of the bypass pipeline is connected to a second connection point on the pipeline between the evaporator and the second refrigerant inlet.

5. The refrigerating unit according to claim 4, characterized in that: Also includes: A first control valve, located on the defrost circulation pipeline, for controlling the on-off of the defrost circulation pipeline; A second control valve, located on the bypass pipeline, for controlling the on-off of the bypass pipeline; A third control valve, located on the refrigeration cycle pipeline, is used to control the on-off of the refrigeration cycle pipeline; A throttling device is located on the pipeline between the second refrigerant inlet and the second connection point, and is used to control the refrigerant flow rate of the defrost circulation pipeline and the bypass pipeline.

6. The refrigerating unit according to claim 2, characterized in that: The heating component includes at least one of the following: an electric control box and a motor; the refrigeration unit also includes: A first circulation pump, located on the heat dissipation circulation pipeline, is used to provide power for the coolant to circulate in the heat dissipation circulation pipeline; A second circulation pump, located on the defrost circulation pipeline, is used to provide power for the refrigerant to circulate in the defrost circulation pipeline; A third circulation pump, located on the refrigeration circulation pipeline, is used to provide power for the coolant to circulate in the refrigeration circulation pipeline; A heating component temperature sensing package, located on the heating component, for detecting the temperature of the heating component; A defrost water temperature sensing package, located at the place where the defrost circulation pipeline enters the evaporator, and used to detect the defrost water temperature of the defrost circulation pipeline entering the evaporator; The defrost temperature sensing package is located at the place where the defrost circulation pipeline flows out of the evaporator, and is used to detect the temperature of the refrigerant flowing out of the evaporator from the defrost circulation pipeline as the defrost temperature.

7. A refrigeration unit control method, applied to the refrigeration unit according to any one of claims 1 to 6, characterized in that: The method comprises: Detecting whether the evaporator of the refrigeration unit needs to be defrosted; When defrosting is required, a defrosting circulation pipeline is used to defrost the evaporator; When defrosting is not required, a heat dissipation circulation pipeline is used to dissipate heat for the heating components of the refrigeration unit.

8. The method according to claim 7, characterized in that The method of using a defrost circulation pipeline to defrost the evaporator includes: The refrigeration circulation pipeline is controlled to be disconnected, the defrost circulation pipeline and the heat dissipation circulation pipeline are connected, the opening of the throttling device is controlled to be adjusted to the maximum opening, and the heat of the heating component is used to defrost the evaporator.

9. The method according to claim 8, characterized in that After the opening of the throttling device is adjusted to the maximum opening, the method further includes: Detecting the defrost water temperature, and controlling the electric heating device to heat the refrigerant in the defrost circulation pipeline according to the defrost water temperature; wherein, when the defrost water temperature is lower than a first preset temperature, controlling the electric heating device to turn on until defrosting is completed; Detect the defrost temperature, determine whether defrosting is finished according to the defrost temperature, and control the defrost circulation pipeline to be disconnected after defrosting is finished, connect the refrigeration circulation pipeline and the heat dissipation circulation pipeline, and close the throttling device; wherein, when the defrost temperature is greater than or equal to a second preset temperature, it is determined that defrosting is finished.

10. The method according to claim 7, characterized in that A heat dissipation circulation pipeline is used to dissipate heat for the heat generating components of the refrigeration unit, including: Detecting the temperature of the heating component; Determining whether the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component according to the temperature of the heat dissipation component; If yes, continue to use the heat dissipation circulation pipeline to dissipate heat for the heat generating components of the refrigeration unit; Otherwise, the heat dissipation circulation pipeline and the bypass pipeline are used to dissipate heat for the heat generating components of the refrigeration unit.

11. The method according to claim 10, characterized in that Judging whether the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component according to the temperature of the heat dissipation component, including: judging whether the temperature of the electric control box or the temperature of the motor is less than or equal to a third preset temperature, if so, determining that the heat dissipation circulation pipeline meets the heat dissipation demand of the heat dissipation component, otherwise, determining that the heat dissipation circulation pipeline does not meet the heat dissipation demand of the heat dissipation component; The heat dissipation circulation pipeline and the bypass pipeline are used to dissipate heat for the heating components of the refrigeration unit, including: controlling the second control valve of the bypass pipeline to open, detecting the temperature of the electric control box and the temperature of the motor; and controlling the opening of the throttling device according to the larger of the temperature of the electric control box and the temperature of the motor.

12. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to execute the refrigeration unit control method according to any one of claims 7 to 11 when executed by a computer processor.

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