A refrigeration device and its control method and control apparatus

Abstract

This application discloses a refrigeration device and its control method and control apparatus. The refrigeration device includes an inner liner having a storage cavity and an opening at the top of the inner liner; a first evaporator and a second evaporator, the first evaporator and the second evaporator being located outside the inner liner, and vertically, the first evaporator being located below the second evaporator; and a valve assembly for controlling the flow of refrigerant in the first evaporator and the second evaporator; wherein the refrigeration device has a first refrigeration state and a second refrigeration state; when the refrigeration device is in the first refrigeration state, the valve assembly controls the flow of refrigerant in the first evaporator and the second evaporator; when the refrigeration device is in the second refrigeration state, the valve assembly controls the refrigerant to flow only in the first evaporator.

Description

TECHNICAL FIELD

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

[0002] The energy consumption of a refrigeration device such as a refrigerator is a concern of users. Reducing energy consumption is an important research topic for refrigeration devices to meet the needs of users and energy saving. A top-opening refrigerator is a common device in refrigeration devices, and is favored in scenarios such as cold storage and catering because it has a large space. However, when storing some items, it is placed in the bottom area of the refrigerator; when refrigeration is needed, the refrigerator needs to provide cold energy to the whole space, resulting in a mismatch between the provided cold energy and the cold energy demand, leading to waste of cold energy and high energy consumption. SUMMARY

[0003] The main purpose of the present application is to provide a refrigeration device and a control method and control device thereof, aiming to solve the technical problems of waste of cold energy and high energy consumption of a top-opening refrigeration device in the prior art.

[0004] In a first aspect, the present application provides a refrigeration device, comprising:

[0005] An inner container having a storage cavity and an opening provided at the top of the inner container;

[0006] A first evaporator and a second evaporator provided outside the inner container, and in the vertical direction, the first evaporator is located below the second evaporator; and

[0007] A valve group for controlling the flow of refrigerant in the first evaporator and the second evaporator; wherein the refrigeration device has a first refrigeration state and a second refrigeration state; when the refrigeration device is in the first refrigeration state, the valve group controls the flow of refrigerant in the first evaporator and the second evaporator; when the refrigeration device is in the second refrigeration state, the valve group controls the flow of refrigerant only in the first evaporator.

[0008] Optionally, the valve group comprises a first expansion valve, a second expansion valve and a valve; the first expansion valve is connected in series with the first evaporator to form a first refrigerant flow path; the second expansion valve, the second evaporator and the valve are connected in series to form a second refrigerant flow path; and the first expansion valve is connected in parallel with the second refrigerant flow path; the first evaporator and the second evaporator are arranged in series;

[0009] Wherein, when the refrigeration device is in the first refrigeration state, the valve is in an open state, and the second expansion valve is in an open state; when the refrigeration device is in the second refrigeration state, the valve is in a closed state, and the first expansion valve is in an open state.

[0010] Optionally, when the refrigeration device is in the first refrigeration state, the first expansion valve is in a closed state.

[0011] Optionally, the valve group comprises a first expansion valve, a second expansion valve and a valve; the first expansion valve is connected in series with the first evaporator to form a first refrigerant flow path; the second expansion valve, the second evaporator and the valve are connected in series to form a second refrigerant flow path; and the first expansion valve is connected in parallel with the second refrigerant flow path; the first evaporator and the second evaporator are arranged in parallel;

[0012] Wherein, when the refrigeration device is in the first refrigeration state, the valve is in an open state, and the second expansion valve and the first expansion valve are in an open state; when the refrigeration device is in the second refrigeration state, the valve is in a closed state, and the first expansion valve is in an open state.

[0013] Optionally, the valve group further comprises a one-way valve, which is arranged in the second refrigerant flow path and configured to not allow refrigerant to flow to the second evaporator when the refrigeration device is in the second refrigeration state.

[0014] Optionally, the refrigeration device further comprises a compressor and a condenser; the condenser is connected with the compressor;

[0015] The condenser is connected with the first evaporator and the second evaporator, and is configured to provide condensed refrigerant to the first evaporator and the second evaporator;

[0016] The first evaporator and the second evaporator are connected with the compressor, and the compressor is configured to pressurize refrigerant after heat exchange of the first evaporator and the second evaporator.

[0017] Optionally, the first evaporator and the second evaporator each comprise a heat exchange pipe, and the heat exchange pipe is wound on an outer surface of the inner container.

[0018] In a second aspect, the application further provides a control method of a refrigeration device, configured to control the refrigeration device as described above, and the control method comprises:

[0019] Obtaining a current storage capacity in the inner container;

[0020] When the current storage capacity is less than a preset capacity, controlling the refrigeration device to operate in the second refrigeration state.

[0021] control the refrigeration device to operate in the first refrigeration state when the current storage capacity is greater than the preset capacity.

[0022] In a third aspect, the present application further provides a control device of a refrigeration device, used for controlling the refrigeration device as described above, and the control device comprises:

[0023] an acquisition module, configured to acquire a current storage capacity in the inner container;

[0024] a control module, configured to control the refrigeration device to operate in the second refrigeration state when the current storage capacity is less than the preset capacity;

[0025] the control module is further configured to control the refrigeration device to operate in the first refrigeration state when the current storage capacity is greater than the preset capacity.

[0026] In the technical scheme of the embodiments of the present application, the inner container of the refrigeration device has a top-opening opening, and the user places the items to be stored into the storage cavity from the opening; the first evaporator and the second evaporator are arranged outside the inner container to provide cold energy to the inner container; and the first evaporator is arranged below the second evaporator in the vertical direction; the valve group controls the refrigerant to flow in the first evaporator and the second evaporator when the refrigeration device is in the first refrigeration state, so that the first evaporator and the second evaporator simultaneously provide cold energy to the inner container; and the valve group controls the refrigerant to flow only in the first evaporator when the refrigeration device is in the second refrigeration state. Since the items are gradually accumulated from bottom to top, when there are more items, the refrigeration device can operate in the first refrigeration state to provide cold energy to most areas of the inner container; and when there are fewer items, the refrigeration device can operate in the second refrigeration state to provide cold energy only to the bottom area of the inner container, so that the provided cold energy can be concentrated in the bottom area when the storage items are few, the matching degree of cold energy supply and demand is high, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the drawings shown.

[0028] Figure 1 A refrigeration principle structure of a refrigeration device provided by an embodiment of the present application Figure 1 ;

[0029] Figure 2 A structure diagram of a refrigeration device provided by an embodiment of the present application;

[0030] Figure 3 A refrigeration principle structure schematic of a refrigeration equipment provided for an embodiment of the present application Figure 2 ;

[0031] Figure 4 A refrigeration principle structure schematic of a refrigeration equipment provided for an embodiment of the present application Figure 3 ;

[0032] Figure 5 A refrigeration principle structure schematic of a refrigeration equipment provided for an embodiment of the present application Figure 4 ;

[0033] Figure 6 A control method flow schematic of a refrigeration equipment provided for an embodiment of the present application

[0034] Figure 7 A control device flow schematic of a refrigeration equipment provided for an embodiment of the present application.

[0035] List of reference signs

[0036] 110 Inner container 144 Check valve 120 First evaporator 150 Condenser 130 Second evaporator 160 Compressor 140 Valve group 170 Dry filter 141 First expansion valve 210 Acquisition module 142 Valve 220 Control module 143 Second expansion valve DETAILED DESCRIPTION

[0037] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0038] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application.

[0041] In combination Figure 1 And Figure 2 As shown in the figure, the embodiments of the present application provide a refrigeration equipment, comprising:

[0042] A liner 110, the liner 110 has a storage cavity and an opening provided at the top of the liner 110;

[0043] A first evaporator 120 and a second evaporator 130, the first evaporator 120 and the second evaporator 130 are provided outside the liner 110, and in the vertical direction, the first evaporator 120 is located at the lower side of the second evaporator 130; and

[0044] A valve group 140 for controlling the flow of refrigerant in the first evaporator 120 and the second evaporator 130; wherein the refrigeration equipment has a first refrigeration state and a second refrigeration state; when the refrigeration equipment is in the first refrigeration state, the valve group 140 controls the flow of refrigerant in the first evaporator 120 and the second evaporator 130; when the refrigeration equipment is in the second refrigeration state, the valve group 140 controls the flow of refrigerant only in the first evaporator 120.

[0045] In the technical solution of this application embodiment, the inner liner 110 of the refrigeration equipment has a top-opening opening, through which the user places the items to be stored into the storage cavity; the first evaporator 120 and the second evaporator 130 are located on the outside of the inner liner 110, providing cooling capacity to the inner liner 110; and the first evaporator 120 is positioned vertically below the second evaporator 130; when the refrigeration equipment is in the first refrigeration state, the valve assembly 140 controls the flow of refrigerant in the first evaporator 120 and the second evaporator 130, thereby the first evaporator 120 and the second evaporator 130 simultaneously provide cooling capacity to the inner liner 110; while when the refrigeration equipment is in the second refrigeration state, the valve assembly 140 controls the refrigerant to flow only in the first evaporator 120. As items gradually accumulate from bottom to top, when there are many items, the refrigeration equipment can operate in the first refrigeration state, providing cooling to most areas of the inner liner 110; while when there are fewer items, the refrigeration can operate in the second refrigeration state, providing cooling only to the bottom area of ​​the inner liner 110. This ensures that when there are few stored items, the provided cooling can be concentrated in the bottom area, resulting in a high degree of matching between cooling supply and demand and reducing energy consumption.

[0046] In some embodiments, such as Figure 2 As shown, the first evaporator 120 is configured for the lower half of the inner liner 110, and the second evaporator 130 is configured for the upper half of the inner liner 110. In this embodiment, the refrigeration equipment can perform half-pack cooling and full-pack cooling. During half-pack cooling, the valve assembly 140 controls the refrigerant to flow only within the first evaporator 120, for situations where the amount of items stored is less than or close to half the capacity of the inner liner 110. During full-pack cooling, the valve assembly 140 controls the refrigerant to flow within both the first evaporator 120 and the second evaporator 130, for situations where the amount of items stored is greater than half the capacity of the inner liner 110. Therefore, the refrigeration equipment in this embodiment can switch between half-pack cooling (second cooling state) and full-pack cooling (first cooling state) according to the capacity of items placed in the inner liner 110, which helps to balance the supply and demand of cooling capacity and reduce energy consumption.

[0047] For example, in some application scenarios, consumers or users only need a small amount of frozen products; however, in existing technologies, the entire container needs to be refrigerated to freeze the products, which consumes a lot of energy and takes a long time to freeze; while in the technical solution of this application, half-container refrigeration can be used to freeze the products, so that the cold energy supply is concentrated at the bottom of the inner liner 110, which consumes less energy and has a shorter freezing time, thus reducing costs and increasing efficiency.

[0048] In embodiments, the liner 110 can be a refrigeration liner 110, a freezing liner 110, or a refrigeration-freezing liner 110. The liner 110, the first evaporator 120, the second evaporator 130, and the valve group 140 are disposed in a space defined by a housing of the refrigeration device. In embodiments, the refrigeration device further comprises a controller configured to control the refrigeration device to switch between the first refrigeration state and the second refrigeration state, i.e., the controller is configured to output control instructions to the valve group 140.

[0049] In some alternative embodiments of the present application, as shown in Figure 3 the valve group 140 comprises a first expansion valve 141, a second expansion valve 143, and a valve 142; the first expansion valve 141 is connected in series with the first evaporator 120 to form a first refrigerant flow path; the second expansion valve 143, the second evaporator 130, and the valve 142 are connected in series to form a second refrigerant flow path; and the first expansion valve 141 is connected in parallel with the second refrigerant flow path; and the first evaporator 120 is connected in series with the second evaporator 130. In the first refrigeration state, the valve 142 is in an open state, and the second expansion valve 143 is in an open state, so that refrigerant flows in the first evaporator 120 and the second evaporator 130; in the second refrigeration state, the valve 142 is in a closed state, and the first expansion valve 141 is in an open state, so that refrigerant only flows in the first evaporator 120. In some embodiments, in the first refrigeration state, the first expansion valve 141 can be in an open state. The opening degree of the first expansion valve 141 and the second expansion valve 143 can be controlled according to the storage capacity of the liner 110 to adjust the flow rate of refrigerant flowing in the first evaporator 120 and the second evaporator 130, so as to adjust the distribution of cold energy.

[0050] In some other embodiments, when the refrigeration device is in the first refrigeration state, the first expansion valve 141 can be in a closed state. In this embodiment, when the first expansion valve 141 is closed, the refrigerant passes through the second expansion valve 143, and the flow rates in the first evaporator 120 and the second evaporator 130 are the same. In this embodiment, taking the case where the first evaporator 120 is arranged in the lower half and the second evaporator 130 is arranged in the upper half as an example; after the refrigeration device is powered on and powered on, when the refrigeration device needs to start the full-box refrigeration mode (the first refrigeration state), first, the valve 142 is powered on, the first expansion valve 141 is closed, the second expansion valve 143 is opened, the low-pressure gaseous refrigerant passes through the valve 142, and then the pressure is reduced after passing through the throttling of the second expansion valve 143, and the refrigerant liquid flows into the second evaporator 130 and the first evaporator 120 to realize refrigeration of the full box of the refrigeration device. The refrigerant absorbs the heat energy in the tank to heat and evaporate itself into superheated steam, which then enters the compressor 160 through the suction pipe to complete a cycle; when the half-box refrigeration mode is started (the second refrigeration state), first, the valve 142 is powered off and closed, and the first expansion valve 141 is opened to realize refrigeration of only the lower part of the inner container 110 of the refrigeration device.

[0051] In some other optional embodiments of the present application, as shown in Figure 4 the valve group 140 includes a first expansion valve 141, a second expansion valve 143, and a valve 142; the first expansion valve 141 is connected in series with the first evaporator 120 to form a first refrigerant flow path; the second expansion valve 143, the second evaporator 130, and the valve 142 are connected in series to form a second refrigerant flow path; and the first expansion valve 141 is connected in parallel with the second refrigerant flow path; the first evaporator 120 and the second evaporator 130 are arranged in parallel; wherein, when the refrigeration device is in the first refrigeration state, the valve 142 is in an open state, the second expansion valve 143 and the first expansion valve 141 are in an open state, at this time, the refrigerant flows to the first evaporator 120 and the second evaporator 130, respectively, and the flow rates of the first evaporator 120 and the second evaporator 130 can be adjusted by adjusting the opening degrees of the first expansion valve 141 and the second expansion valve 143, thereby adjusting the distribution of the refrigeration capacity; when the refrigeration device is in the second refrigeration state, the valve 142 is in a closed state, and the first expansion valve 141 is in an open state, at this time, the first refrigerant only passes through the first evaporator 120 to refrigerate the lower part of the inner container 110.

[0052] In some other optional embodiments of the present application, as shown in Figure 5As shown, as an optional implementation of the above embodiment, the valve group 140 includes a first expansion valve 141 and a second expansion valve 143; the first expansion valve 141 is connected in series with the first evaporator 120 to form a first refrigerant flow path; the second expansion valve 143 is connected in series with the second evaporator 130 to form a second refrigerant flow path; the first refrigerant flow path and the second refrigerant flow path are connected in parallel; when the refrigeration device is in the first refrigeration state, the first expansion valve 141 is in an open state, and the second expansion valve 143 is in an open state, and the flow rates of the first evaporator 120 and the second evaporator 130 can be adjusted by adjusting the opening degrees of the first expansion valve 141 and the second expansion valve 143, and then the distribution of the refrigeration capacity is adjusted; when the refrigeration device is in the second refrigeration state, the second expansion valve 143 is in a closed state, and the first expansion valve 141 is in an open state, at this time, the first refrigerant only passes through the first evaporator 120 to refrigerate the lower region of the inner container 110.

[0053] As an optional implementation of the above embodiment, as shown in Figure 3 、 Figure 4 or Figure 5 , the valve group 140 further includes a one-way valve 144, which is arranged in the second refrigerant flow path and is configured to not allow the refrigerant to flow to the second evaporator 130 when the refrigeration device is in the second refrigeration state. That is, in the technical solution of the embodiment of the present application, when the refrigeration device operates in the second refrigeration state, the refrigerant will not flow into the second evaporator 130 under the action of the one-way valve 144; and the refrigerant in the second refrigerant flow path can be sucked into the first refrigerant flow path to participate in the circulation of the refrigerant, so that the refrigerant in the refrigeration system is sufficient to participate in the circulation.

[0054] As an optional implementation of the above embodiment, in combination with Figure 1 、 Figure 3 、 Figure 4 and Figure 5As shown, the refrigeration equipment further includes a compressor 160 and a condenser 150; the condenser 150 is connected to the compressor 160. The high-temperature, high-pressure refrigerant compressed by the compressor 160 flows to the condenser 150, where it releases heat and reduces pressure, condensing to form a low-temperature, low-pressure refrigerant. The condenser 150 is connected to the first evaporator 120 and the second evaporator 130, providing them with the condensed refrigerant. The low-temperature, low-pressure refrigerant formed after condensation flows either to the first evaporator 120 or to both evaporators 120 and 130 under the action of the valve assembly 140. The first evaporator 120 and the second evaporator 130 are connected to the compressor 160, which pressurizes the refrigerant after heat exchange in the first evaporator 120 and the second evaporator 130. After absorbing heat in the first evaporator 120 and the second evaporator 130, the refrigerant re-enters the compressor 160 to complete the cycle.

[0055] For example, such as Figure 3 As shown, in the first refrigeration state, with the first expansion valve 141 closed, the refrigerant after passing through the condenser 150 sequentially passes through valve 142, the second expansion valve 143, the second evaporator 130, the one-way valve 144, and the first evaporator 120, finally flowing into the compressor 160 to complete one cycle. Figure 3 As shown, in the first refrigeration state, with the first expansion valve 141 open, the refrigerant after passing through the condenser 150, the first part of the refrigerant passes through valve 142, the second expansion valve 143, the second evaporator 130, and the one-way valve 144 in sequence. The second part passes through the first expansion valve 141 and merges with the first part before flowing into the first evaporator 120, and finally flows into the compressor 160, completing one cycle.

[0056] In this embodiment, the refrigeration equipment also includes a dryer filter 170, which is located between the condenser 150 and the valve group 140. The condensed refrigerant first flows through the dryer filter 170 and then, under the control of the valve group 140, flows only to the first evaporator 120, or to the first evaporator 120 and the second evaporator 130.

[0057] As an optional implementation of the above embodiments, both the first evaporator 120 and the second evaporator 130 include heat exchange tubes, which are wound around the outer surface of the inner liner 110. In this embodiment, the heat exchange tubes are wound around the outer surface of the inner liner 110 to provide cooling to the interior of the inner liner 110 through heat transfer.

[0058] Secondly, such as Figure 6As shown, the embodiments of the present application also propose a control method of the refrigeration equipment, used for controlling the refrigeration equipment as described above, and the control method comprises:

[0059] S100, acquiring a current storage capacity in the inner container 110;

[0060] S210, when the current storage capacity is less than a preset capacity, controlling the refrigeration equipment to operate in the second refrigeration state;

[0061] S220, when the current storage capacity is greater than the preset capacity, controlling the refrigeration equipment to operate in the first refrigeration state.

[0062] In the embodiments, the refrigeration state of the refrigeration equipment is controlled by the current storage capacity, so that the cold quantity provided by the refrigeration equipment can be matched with the required cold quantity as much as possible, energy consumption is saved, and the storage effect of the articles is ensured.

[0063] In the embodiments, the preset capacity is set in correspondence with the height of the first evaporator 120 arranged on the inner container 110. For example, when the height of the first evaporator 120 arranged on the inner container 110 is half of the height of the inner container 110, the preset capacity can be set as half of the capacity of the inner container 110. That is, when the current storage capacity is less than half of the capacity of the inner container 110, only the cold quantity provided by the first evaporator 120.

[0064] In a third aspect, a control device of the refrigeration equipment is provided, used for controlling the refrigeration equipment as described above, and the control device comprises: Figure 7 The acquisition module 210 is configured to acquire a current storage capacity in the inner container 110.

[0065] The control module 220 is configured to, when the current storage capacity is less than a preset capacity, control the refrigeration equipment to operate in the second refrigeration state.

[0066] The control module 220 is further configured to, when the current storage capacity is greater than the preset capacity, control the refrigeration equipment to operate in the first refrigeration state.

[0067] In the embodiments, the refrigeration state of the refrigeration equipment is controlled by the current storage capacity, so that the cold quantity provided by the refrigeration equipment can be matched with the required cold quantity as much as possible, energy consumption is saved, and the storage effect of the articles is ensured.

[0068] In the embodiments, the refrigeration state of the refrigeration equipment is controlled by the current storage capacity, so that the cold quantity provided by the refrigeration equipment can be matched with the required cold quantity as much as possible, energy consumption is saved, and the storage effect of the articles is ensured.

[0069] In the embodiment, the preset capacity is set in correspondence with the height of the first evaporator 120 arranged on the inner container 110. For example, the height of the first evaporator 120 arranged on the inner container 110 is half of the height of the inner container 110, and the preset capacity can be set as half of the capacity of the inner container 110. That is, when the current storage capacity is less than half of the capacity of the inner container 110, only the first evaporator 120 provides the cold capacity.

[0070] The technical scheme provided by the embodiments of the present application can meet the storage requirements of users, and can achieve the lowest energy consumption under different use states and user demand requirements, so that the high-efficiency and reliable operation of the refrigeration equipment and the refrigeration system is achieved, the system energy consumption is minimized, the overall energy consumption is reduced, the energy efficiency level of the product is improved, and the market competitive advantage of the product is enhanced. The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like made by using the content of the present application specification and drawings is included in the patent protection scope of the present application.

Claims

1. A refrigeration device, characterized in that, include: The inner liner has a storage cavity and an opening at the top of the inner liner; A first evaporator and a second evaporator are disposed on the outside of the inner liner, and in the vertical direction, the first evaporator is located below the second evaporator; as well as A valve assembly is provided for controlling the flow of refrigerant in the first evaporator and the second evaporator; wherein the refrigeration equipment has a first refrigeration state and a second refrigeration state; when the refrigeration equipment is in the first refrigeration state, the valve assembly controls the flow of refrigerant in the first evaporator and the second evaporator; when the refrigeration equipment is in the second refrigeration state, the valve assembly controls the flow of refrigerant only in the first evaporator.

2. The refrigeration equipment as described in claim 1, characterized in that, The valve assembly includes a first expansion valve, a second expansion valve, and a valve; the first expansion valve is connected in series with the first evaporator to form a first refrigerant flow path; the second expansion valve, the second evaporator, and the valve are connected in series to form a second refrigerant flow path; and the first expansion valve and the second refrigerant flow path are connected in parallel; the first evaporator and the second evaporator are connected in series. Specifically, when the refrigeration equipment is in the first refrigeration state, the valve is in the open state and the second expansion valve is in the open state; when the refrigeration equipment is in the second refrigeration state, the valve is in the closed state and the first expansion valve is in the open state.

3. The refrigeration equipment as described in claim 2, characterized in that, When the refrigeration equipment is in the first refrigeration state, the first expansion valve is in the closed state.

4. The refrigeration equipment as described in claim 1, characterized in that, The valve assembly includes a first expansion valve, a second expansion valve, and a valve; the first expansion valve is connected in series with the first evaporator to form a first refrigerant flow path; the second expansion valve, the second evaporator, and the valve are connected in series to form a second refrigerant flow path; and the first expansion valve and the second refrigerant flow path are connected in parallel; the first evaporator and the second evaporator are arranged in parallel. Specifically, when the refrigeration equipment is in the first refrigeration state, the valve is in the open state, and both the second expansion valve and the first expansion valve are in the open state; when the refrigeration equipment is in the second refrigeration state, the valve is in the closed state, and the first expansion valve is in the open state.

5. The refrigeration equipment as described in claim 1, characterized in that, The valve assembly includes a first expansion valve and a second expansion valve; the first expansion valve is connected in series with the first evaporator to form a first refrigerant flow path; the second expansion valve is connected in series with the second evaporator to form a second refrigerant flow path; the first refrigerant flow path and the second refrigerant flow path are arranged in parallel. When the refrigeration equipment is in the first refrigeration state, the first expansion valve is in the open state and the second expansion valve is in the open state; When the refrigeration equipment is in the second refrigeration state, the second expansion valve is in the closed state and the first expansion valve is in the open state.

6. The refrigeration equipment as described in any one of claims 2 to 5, characterized in that, The valve assembly also includes a one-way valve, which is located in the second refrigerant flow path and configured to prevent refrigerant from flowing to the second evaporator when the refrigeration equipment is in the second refrigeration state.

7. The refrigeration equipment as described in any one of claims 1 to 5, characterized in that, The refrigeration equipment further includes a compressor and a condenser; the condenser is connected to the compressor. The condenser is connected to the first evaporator and the second evaporator and is used to provide condensed refrigerant to the first evaporator and the second evaporator; The first evaporator and the second evaporator are connected to the compressor, which is used to pressurize the refrigerant after heat exchange in the first evaporator and the second evaporator.

8. The refrigeration equipment as described in any one of claims 1 to 5, characterized in that, Both the first evaporator and the second evaporator include heat exchange tubes, which are wound around the outer surface of the inner liner.

9. A control method for a refrigeration device, characterized in that, The control method for controlling the refrigeration equipment according to any one of claims 1 to 8 includes: Get the current storage capacity in the inner liner; When the current storage capacity is less than the preset capacity, the refrigeration equipment is controlled to operate in the second refrigeration state; When the current storage capacity is greater than the preset capacity, the refrigeration equipment is controlled to operate in the first refrigeration state.

10. A control device for a refrigeration equipment, characterized in that, For controlling the refrigeration equipment according to any one of claims 1 to 8, the control device comprises: The acquisition module is used to obtain the current storage capacity in the inner liner; The control module is used to control the refrigeration equipment to operate in the second refrigeration state when the current storage capacity is less than the preset capacity; The control module is also used to control the refrigeration equipment to operate in the first refrigeration state when the current storage capacity is greater than the preset capacity.

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