Constant-temperature display cabinet adaptive to selling scene and capable of switching cold and heat combined supply mode

Abstract

The invention relates to the technical field of display cabinets, in particular to a selling scene adaptive constant-temperature display cabinet capable of switching a cold and heat combined supply mode, which comprises a cabinet body assembly, a refrigerating and heating system and a control module, the cabinet body assembly comprises two independent heat preservation cabinet bodies which are the first cabinet body and the second cabinet body respectively. The refrigerating and heating system comprises a compressor, a four-way reversing valve, an external heat exchanger, two internal heat exchangers, three electromagnetic valves, two capillary tubes and an electric heating wire. According to the selling scene adaptive constant-temperature display cabinet capable of switching the cold and heat combined supply mode, the problem that equipment is idle can be solved, the utilization rate is increased, through flexible switching of the total cold mode, the total heat mode and the cold and heat combined supply mode, the display cabinet is adaptive to different seasons in winter, summer, spring and autumn and different selling scenes such as scenic spots and convenience stores, one device can replace a traditional independent cold and heat insulation cabinet, and the cost is reduced. Out-of-season equipment idling is thoroughly avoided, frequent equipment replacement is not needed, the equipment moving frequency is reduced, and the damage risk in the carrying process is reduced.

Description

Technical Field

[0001] This invention relates to the field of display cabinet technology, and more specifically, to a constant temperature display cabinet with a convertible cooling and heating mode that is adaptable to different sales scenarios. Background Technology

[0002] In retail settings such as open-air scenic spots and convenience stores, the need for both hot and cold storage often exists simultaneously, and the demand varies significantly with seasonal temperatures. Currently, businesses often meet this need by purchasing separate heating and cooling cabinets and refrigeration / freezing cabinets. However, this solution has significant drawbacks: the equipment is easily left idle during off-seasons and is inconvenient to move; the purchase cost of both types of equipment is high; and when independent units are connected in parallel, the current is large, resulting in high energy consumption, safety hazards, and significant noise.

[0003] The problem is particularly pronounced in small-scale retail settings such as tourist attractions: these sales points need to offer both ice cream and baked goods simultaneously, and are typically equipped with only one main power line. Split-type hot and cold storage cabinets are not only difficult to move and require significant financial investment, but also suffer from excessive current due to multiple devices connected in parallel, drastically reducing safety. Therefore, there is an urgent need for a constant-temperature storage device that can adapt to multiple scenarios, flexibly switch between hot and cold modes, and offers advantages such as energy saving, safety, and low cost, to solve the problems of low equipment utilization, high energy consumption, and insufficient safety in existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a constant temperature display cabinet with a convertible cooling and heating mode that is adaptable to various sales scenarios, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides a constant temperature display cabinet with a convertible cooling and heating mode that is adaptable to sales scenarios, including cabinet components, a cooling and heating system and a control module; The cabinet assembly includes two independent insulated cabinets, namely the first cabinet and the second cabinet; the refrigeration and heating system includes a compressor, a four-way reversing valve, an external heat exchanger, two internal heat exchangers, three solenoid valves, two capillary tubes, and an electric heating wire; the internal heat exchangers include the first heat exchanger and the second heat exchanger, the solenoid valves include the first solenoid valve, the second solenoid valve, and the third solenoid valve, and the capillary tubes include the first capillary tube and the second capillary tube.

[0006] This setup integrates cabinet components, refrigeration and heating systems, and control modules. It combines two independent insulated cabinets with core refrigeration and heating components, replacing traditional split-type insulated cabinets. It provides hardware support for switching between three modes and adapts to the comprehensive temperature storage needs of multiple sales scenarios.

[0007] As a preferred embodiment of the present invention, the first heat exchanger is disposed in the first cabinet, the second heat exchanger is disposed in the second cabinet, and the electric heating wire is disposed in the first cabinet.

[0008] This feature allows for a dual-cabinet configuration of the heat exchanger and a dedicated electric heating wire for one of the cabinets, enabling independent cooling or heating for a single cabinet. This ensures accurate temperature control in both temperature zones and meets the diverse storage needs of different types of materials.

[0009] In a preferred embodiment of the present invention, the output end of the compressor is connected to the input end of the four-way reversing valve. The first output end of the four-way reversing valve is connected to one end of the external heat exchanger and one end of the first solenoid valve. The other end of the external heat exchanger is connected to the first heat exchanger, the third solenoid valve, and one end of the second capillary tube through the first capillary tube. The third solenoid valve and the other end of the second capillary tube are connected to the second heat exchanger after merging. The second output end of the four-way reversing valve is directly connected to the other end of the second heat exchanger and is also connected to the other end of the first heat exchanger through the second solenoid valve. The other end of the first solenoid valve and the other end of the second heat exchanger are connected to the second output end of the four-way reversing valve. The output end of the four-way reversing valve is connected to the input end of the compressor.

[0010] This setup ensures clear connection logic for the piping of each component, guarantees smooth refrigerant flow, improves the operating efficiency of the refrigeration and heating system, avoids the problems of messy piping and energy waste caused by multiple devices connected in parallel, and enhances the stability of equipment operation.

[0011] As a preferred embodiment of the present invention, the control module is electrically connected to the four-way reversing valve, three solenoid valves, the compressor and the electric heating wire respectively. By controlling the reversing state of the four-way reversing valve, the on / off state of the three solenoid valves and the start / stop of the compressor and the electric heating wire, the switching between three modes of combined cooling and heating, dual-temperature zone dual cooling and dual-temperature zone dual heating can be realized. In each mode, the two independent insulation cabinets can realize dual-temperature zone storage.

[0012] This feature allows the control module to centrally regulate all core components, enabling rapid switching between three modes: combined cooling and heating, dual-temperature zone dual cooling, and dual-temperature zone dual heating. Furthermore, both cabinets consistently support dual-temperature zone storage, eliminating the need for equipment replacement, thus improving utilization and reducing operational complexity.

[0013] As a preferred embodiment of the present invention, the combined cooling and heating mode includes two sub-modes, specifically implemented as follows: the control module controls the four-way reversing valve to be in the forward reversing state, and the refrigerant flows clockwise; First sub-mode: The control module controls the first solenoid valve to open and the second and third solenoid valves to close. Since the throttling effect of the first capillary tube connected in series with the external heat exchanger is much greater than that of the first heat exchanger, the external heat exchanger is short-circuited. The first heat exchanger is connected in series with the second heat exchanger through the second capillary tube. The first heat exchanger acts as a condenser to supply energy to the first cabinet, and the second heat exchanger acts as an evaporator to supply cooling to the second cabinet. Second sub-mode: The control module controls the third solenoid valve to open, the first solenoid valve and the second solenoid valve to close, the first heat exchanger is short-circuited, the external heat exchanger acts as a condenser to dissipate heat, the second heat exchanger acts as an evaporator to supply cooling to the second cabinet, and the heat of the first cabinet is provided by an electric heating wire. The control module can switch between the first sub-mode and the second sub-mode according to the operating requirements, so as to realize the energy-saving start-up, rapid cooling or rapid cooling deep cryogenic operation logic.

[0014] This system features two complementary sub-modes for combined cooling and heating, balancing energy-saving operation with the need for rapid temperature increase, achieving simultaneous cooling and heating, balancing energy consumption and energy quality, and catering to scenarios with simultaneous cooling and heating needs such as spring and autumn.

[0015] As a preferred embodiment of the present invention, the energy-saving start-up logic is as follows: the control module first controls the equipment to operate in the first sub-mode, adjusts the temperature inside the cabinet to near the desired temperature, then switches to the second sub-mode to continue heating, and after the temperature stabilizes, switches back to the first sub-mode to maintain the temperature. The rapid cooling logic is as follows: when a large amount of room temperature material needs to be frozen after a short period of time is placed in the cabinet, the control module controls the equipment to temporarily switch from the first sub-mode to the second sub-mode to rapidly pull up the temperature. The rapid cooling and deep cooling logic is as follows: For scenarios with frequent power on and off, the control module first controls the device to quickly raise the temperature in the second sub-mode, then switches to the first sub-mode to maintain the temperature, and then cycles between the first sub-mode and the second sub-mode according to the needs.

[0016] This setting features three operating logics to adapt to different working conditions. It reduces energy consumption by switching between sub-modes, quickly responds to the needs of storing large quantities of goods in a short period of time and frequent power on / off cycles, ensures that the temperature of both cabinets reaches the standard quickly and remains stable, and improves the flexibility and practicality of equipment operation.

[0017] As a preferred embodiment of the present invention, the dual-temperature zone dual-cooling mode is implemented as follows: The control module controls the four-way reversing valve to be in the forward reversing state, the first solenoid valve is closed, the second solenoid valve and the third solenoid valve are open, and the third solenoid valve short-circuits the second capillary tube of the second heat exchanger. The external heat exchanger acts as a condenser to dissipate heat, while the first and second heat exchangers are connected in parallel to act as evaporators to supply cooling to the corresponding cabinets. The control module can control the closing state of the second and third solenoid valves to enable the second heat exchanger or the first heat exchanger to operate independently, thereby achieving dual-temperature zone refrigeration storage temperature regulation.

[0018] This feature enables efficient heat dissipation from the external heat exchanger in a dual-temperature zone dual-cooling mode. The two heat exchangers are connected in parallel for cooling, allowing for independent or coordinated cooling of the two cabinets. This adapts to the full cooling demand in summer and meets different cold storage requirements.

[0019] As a preferred embodiment of the present invention, in the dual-temperature zone dual-cooling mode, the control module intermittently closes the second or third solenoid valve and coordinates with the compressor's start and stop frequency to achieve free adjustment of the cold storage temperature of the two independent insulation cabinets; when only a single cabinet needs to be cooled, the control module closes the solenoid valve corresponding to the other cabinet to stop the cooling function of that cabinet.

[0020] This setting allows for free adjustment of the dual-cabinet cooling temperature, shutting down the cooling circuit of idle cabinets to achieve energy saving, reducing the risk of high current when multiple devices are connected in parallel, improving electrical safety, and is suitable for summer sales scenarios with small material quantities.

[0021] As a preferred embodiment of the present invention, the dual-temperature zone dual-heat mode is implemented as follows: The control module controls the four-way reversing valve to be in the reverse reversing state, the refrigerant flows counterclockwise, the first solenoid valve is closed, the second solenoid valve and the third solenoid valve are open, and the third solenoid valve short-circuits the second capillary tube of the second heat exchanger. The external heat exchanger serves as an evaporator, and the first and second heat exchangers are connected in parallel as condensers to supply heat to the corresponding cabinet. The control module can control the electric heating wire to start, further heating the first cabinet where the first heat exchanger is located, and realize dual-temperature zone heating and storage temperature regulation.

[0022] This feature allows for efficient heat absorption by the external heat exchanger in a dual-temperature zone, dual-heat mode. The two heat exchangers are connected in parallel for heating, and electric heating wires are used to achieve temperature gradient adjustment between the two cabinets, adapting to the full heating needs in winter and meeting different heat storage temperature requirements.

[0023] As a preferred embodiment of the present invention, in the dual-temperature zone dual-heating mode, the storage temperature of the first cabinet is adjusted by the power of the electric heating wire, and can exceed 60°C at most; the storage temperature of the second cabinet is achieved through heat exchange in the condenser, and the control module controls its temperature to be below 50°C; when only a single cabinet needs heating, the control module closes the solenoid valve corresponding to the other cabinet, stopping the heating function of that cabinet; when one cabinet experiences a sudden temperature drop due to too much low-temperature material, the control module closes the solenoid valve corresponding to the other cabinet, so that the heat from the cooling and heating system is concentrated on that cabinet, and the power of the electric heating wire can be increased simultaneously to achieve rapid heating of a single cabinet.

[0024] This setup enables differentiated high and low temperature heat storage in dual cabinets, saves energy by shutting down the heating circuits of idle cabinets, and quickly addresses material cooling issues through centralized heat supply and increased electric heating wire power, ensuring stable and flexible heat storage in winter.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The constant temperature display cabinet with convertible cooling and heating mode adapts to the sales scenario, solving the problem of equipment idleness and improving utilization: It can flexibly switch between three modes: all-cooling, all-heating, and cooling and heating, adapting to different seasons such as winter, summer, spring and autumn, as well as different sales scenarios such as scenic spots and convenience stores. One device can replace the traditional independent cooling and heating cabinet, completely avoiding the idleness of off-season equipment, eliminating the need for frequent equipment replacement, reducing the frequency of equipment movement, reducing the risk of damage during transportation, and meeting the seasonal temperature storage needs of retail scenarios.

[0026] 2. The constant temperature display cabinet with convertible heating and cooling mode is suitable for this sales scenario, which reduces investment costs and usage burden: there is no need to purchase heating and insulation cabinets and refrigeration and freezing cabinets separately, which greatly reduces the initial purchase capital pressure, especially alleviating the financial pressure of small and micro retail in scenic areas; at the same time, the single-equipment integrated design reduces the space occupied by the equipment, reduces storage and maintenance costs, and adapts to the needs of flexible sales stalls.

[0027] 3. In the constant temperature display cabinet with convertible combined cooling and heating mode suitable for this sales scenario, electrical safety is improved and energy consumption and noise are reduced: The unified power supply and circuit integration design replaces the large current of multiple devices in parallel with the smaller current of a single device. With centralized current detection, safety hazards caused by excessive current are effectively avoided, which is suitable for the use scenario of a single power supply main line in scenic area stalls; In the combined cooling and heating mode, heat pump heating is used, which has high thermal efficiency and significant energy saving effect, further reducing the main line current load; Compared with multiple units in parallel, the noise of a single unit is significantly reduced, improving the sales environment.

[0028] 4. The constant temperature display cabinet with convertible cooling and heating mode adapts to various storage needs and is suitable for complex scenarios: The dual independent insulated cabinets support dual-temperature storage in any mode. Through the coordinated adjustment of valves, compressors and electric heating wires, different temperature gradients can be achieved for cold or hot storage. For example, hot drinks and hot food at different temperatures can be stored at the same time in winter, cold drinks and frozen foods can be stored separately in summer, and ice cream and baked goods can be supplied simultaneously in spring and autumn. For scenarios such as short-term large-volume storage and frequent on / off switching, sub-mode switching can be used to achieve rapid temperature increase, deep cooling or energy saving, which meets the actual usage needs of convenience stores for daytime and nighttime storage and intermittent power supply in scenic areas. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the cabinet assembly in this invention; Figure 2This is a schematic diagram of the refrigeration and heating system in this invention; Figure 3 This is a schematic diagram of the combined cooling and heating mode in this invention; Figure 4 This is a schematic diagram of the dual-temperature zone dual-cooling mode in this invention; Figure 5 This is a schematic diagram of the dual-temperature zone dual-heat mode in this invention; The meanings of the labels in the diagram are as follows: 1. Cabinet assembly; 11. First cabinet; 12. Second cabinet; 2. Refrigeration and heating system; 21. Compressor; 22. Four-way reversing valve; 23. External heat exchanger; 24. Internal heat exchanger; 241. First heat exchanger; 242. Second heat exchanger; 25. Solenoid valve; 251. First solenoid valve; 252. Second solenoid valve; 253. Third solenoid valve; 26. Capillary tube; 261. First capillary tube; 262. Second capillary tube; 27. Electric heating wire; 3. Control module. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a constant temperature display cabinet with a convertible cooling and heating mode adaptable to various sales scenarios, such as... Figures 1-5 As shown, it includes cabinet assembly 1, refrigeration and heating system 2, and control module 3; The cabinet assembly 1 includes two independent insulated cabinets, namely the first cabinet 11 and the second cabinet 12; the refrigeration and heating system 2 includes a compressor 21, a four-way reversing valve 22, an external heat exchanger 23, two internal heat exchangers 24, three solenoid valves 25, two capillary tubes 26, and an electric heating wire 27; the internal heat exchanger 24 includes a first heat exchanger 241 and a second heat exchanger 242, the solenoid valve 25 includes a first solenoid valve 251, a second solenoid valve 252, and a third solenoid valve 253, and the capillary tube 26 includes a first capillary tube 261 and a second capillary tube 262.

[0032] By integrating cabinet components 1, refrigeration and heating system 2 and control module 3, the first cabinet 11, the second cabinet 12 and core components such as compressor 21 and four-way reversing valve 22 are integrated into one unit, replacing the traditional split-type cold and hot insulation cabinet. This structurally avoids the problems of equipment idleness and inconvenience in movement, provides the hardware foundation for switching between three modes, and adapts to the comprehensive temperature storage needs of multiple sales scenarios such as open-air scenic spots and convenience stores.

[0033] In this embodiment, the first heat exchanger 241 is disposed in the first cabinet 11, the second heat exchanger 242 is disposed in the second cabinet 12, and the electric heating wire 27 is disposed in the first cabinet 11.

[0034] The first heat exchanger 241 and the second heat exchanger 242 are respectively for precise temperature control of the first cabinet 11 and the second cabinet 12. The electric heating wire 27 is dedicated to supplementing heat to the first cabinet 11. The layout design ensures that a single cabinet can independently achieve cooling or heating, which not only ensures the accuracy of dual-temperature zone storage, but also allows the first cabinet 11 to meet higher temperature requirements and adapt to the differentiated storage of different types of materials.

[0035] Specifically, the output end of the compressor 21 is connected to the input end of the four-way reversing valve 22. The first output end of the four-way reversing valve 22 is connected to one end of the external heat exchanger 23 and one end of the first solenoid valve 251. The other end of the external heat exchanger 23 is connected to one end of the first heat exchanger 241, the third solenoid valve 253, and the second capillary tube 262 through the first capillary tube 261. The third solenoid valve 253 and the other end of the second capillary tube 262 merge and are connected to the second heat exchanger 242. The second output end of the four-way reversing valve 22 is directly connected to the other end of the second heat exchanger 242, and is also connected to the other end of the first heat exchanger 241 through the second solenoid valve 252. The other end of the first solenoid valve 251 and the other end of the second heat exchanger 242 merge and are connected to the second output end of the four-way reversing valve 22. The output end of the four-way reversing valve 22 is connected to the input end of the compressor 21.

[0036] The piping connections of each component are compact and logically clear. The refrigerant output from the compressor 21 is precisely diverted through the four-way reversing valve 22. The external heat exchanger 23, the first heat exchanger 241, and the second heat exchanger 242 are linked in an orderly manner through the solenoid valve 25 and the capillary tube 26 to ensure smooth refrigerant flow, improve the operating efficiency of the refrigeration and heating system 2, avoid the problems of messy piping and energy waste caused by multiple devices connected in parallel, and enhance the stability of equipment operation.

[0037] Furthermore, the control module 3 is electrically connected to the four-way reversing valve 22, three solenoid valves 25, compressor 21, and electric heating wire 27 respectively. By controlling the reversing state of the four-way reversing valve 22, the on / off state of the three solenoid valves 25, and the start / stop of the compressor 21 and electric heating wire 27, the switching between three modes of combined cooling and heating, dual-temperature zone dual cooling, and dual-temperature zone dual heating can be realized. In each mode, the two independent insulation cabinets can achieve dual-temperature zone temperature storage.

[0038] The control module 3 enables centralized control of the four-way reversing valve 22, solenoid valve 25, compressor 21, and electric heating wire 27. By switching the reversing state, on / off state, and start / stop, it can quickly realize the conversion between three modes: combined cooling and heating, dual-temperature zone dual cooling, and dual-temperature zone dual heating. Moreover, the dual cabinets always support dual-temperature zone temperature storage without the need to replace equipment, which greatly improves equipment utilization and reduces operational complexity.

[0039] Furthermore, the combined cooling and heating mode includes two sub-modes, specifically implemented as follows: the control module 3 controls the four-way reversing valve 22 to be in the forward reversing state, and the refrigerant flows clockwise; First sub-mode: Control module 3 controls the first solenoid valve 251 to open and the second solenoid valve 252 and the third solenoid valve 253 to close. Since the throttling effect of the first capillary tube 261 connected in series with the external heat exchanger 23 is much greater than that of the first heat exchanger 241, the external heat exchanger 23 is short-circuited. The first heat exchanger 241 is connected in series with the second heat exchanger 242 through the second capillary tube 262. The first heat exchanger 241 acts as a condenser to supply energy to the first cabinet 11, and the second heat exchanger 242 acts as an evaporator to supply cooling to the second cabinet 12. Second sub-mode: Control module 3 controls the third solenoid valve 253 to open, the first solenoid valve 251 and the second solenoid valve 252 to close, the first heat exchanger 241 is short-circuited, the external heat exchanger 23 acts as a condenser to dissipate heat, the second heat exchanger 242 acts as an evaporator to supply cooling to the second cabinet 12, and the heat of the first cabinet 11 is provided by the electric heating wire 27. The control module 3 can control the switching between the first sub-mode and the second sub-mode according to the operating requirements, so as to realize the energy-saving start-up, rapid cooling or rapid cooling deep cryogenic operation logic.

[0040] The two sub-modes of the combined heating and cooling system complement each other and adapt to different needs. The first sub-mode achieves energy-saving operation by short-circuiting the external heat exchanger 23, which is suitable for temperature maintenance. The second sub-mode provides high-quality heat through the electric heating wire 27, which is suitable for rapid temperature increase. The switching between the two ensures the synchronization of heating in the first cabinet 11 and cooling in the second cabinet 12, and achieves a balance between energy saving and high efficiency, which is suitable for the scenario of simultaneous heating and cooling needs in spring and autumn.

[0041] Furthermore, the energy-saving startup logic is as follows: the control module 3 first controls the equipment to operate in the first sub-mode, adjusts the temperature inside the cabinet to near the desired temperature, then switches to the second sub-mode to continue heating, and after the temperature stabilizes, switches back to the first sub-mode to maintain the temperature. The rapid cooling logic is as follows: when a large amount of room temperature material needs to be frozen after a short period of time is placed in the cabinet, the control module 3 controls the device to temporarily switch from the first sub-mode to the second sub-mode to quickly pull up the temperature. The rapid cooling and deep cooling logic is as follows: For scenarios with frequent power on and off, the control module 3 first controls the device to quickly raise the temperature in the second sub-mode, and then switches to the first sub-mode to maintain the temperature. Subsequently, the first sub-mode and the second sub-mode are switched cyclically according to the needs.

[0042] The system features three logics: energy-saving start-up, rapid cooling, and rapid temperature drop deep cooling. These logics optimize the adjustment process for different operating conditions. The switching between the first and second sub-modes reduces energy consumption and can quickly respond to the needs of storing large quantities of goods in a short period of time and frequent start-ups and shutdowns. This ensures that the temperatures of the first cabinet 11 and the second cabinet 12 reach the standard quickly and remain stable, thereby improving the flexibility and practicality of the equipment operation.

[0043] Furthermore, the dual-temperature zone dual-cooling mode is implemented as follows: The control module 3 controls the four-way reversing valve 22 to be in the forward reversing state, the first solenoid valve 251 is closed, the second solenoid valve 252 and the third solenoid valve 253 are open, and the third solenoid valve 253 short-circuits the second capillary tube 262 of the second heat exchanger 242. The external heat exchanger 23 serves as a condenser to dissipate heat, while the first heat exchanger 241 and the second heat exchanger 242 are connected in parallel to serve as evaporators to supply cooling to the corresponding cabinet. The control module 3 can control the closing state of the second solenoid valve 252 and the third solenoid valve 253 to enable the second heat exchanger 242 or the first heat exchanger 241 to operate independently, thereby achieving dual-temperature zone refrigeration storage temperature regulation.

[0044] In the dual-temperature zone dual-cooling mode, the external heat exchanger 23 efficiently dissipates heat, the first heat exchanger 241 and the second heat exchanger 242 are connected in parallel to provide cooling, and the third solenoid valve 253 short-circuits the second capillary tube 262 to optimize the cooling process. By controlling the closing state of the second solenoid valve 252 and the third solenoid valve 253, the dual cabinets can achieve independent or coordinated cooling, adapt to the full cooling demand in summer, and meet the different cold storage requirements of cold drinks, frozen foods, etc.

[0045] Furthermore, in the dual-temperature zone dual-cooling mode, the control module 3 intermittently closes the second solenoid valve 252 or the third solenoid valve 253, and coordinates with the start and stop frequency of the compressor 21 to achieve free adjustment of the cold storage temperature of the two independent insulation cabinets; when only a single cabinet needs to be cooled, the control module 3 closes the solenoid valve 25 corresponding to the other cabinet to stop the cooling function of that cabinet.

[0046] By intermittently closing the second solenoid valve 252 and the third solenoid valve 253, and coordinating with the start and stop frequency of the compressor 21, the cold storage temperature of the first cabinet 11 and the second cabinet 12 can be freely adjusted. The single-cabinet cooling function can shut down the cooling circuit of the idle cabinet to avoid energy waste, while reducing the risk of high current when multiple devices are connected in parallel, improving electrical safety, and adapting to summer sales scenarios with small material quantities.

[0047] Furthermore, the dual-temperature zone dual-heat mode is implemented as follows: The control module 3 controls the four-way reversing valve 22 to be in the reverse reversing state, the refrigerant flows counterclockwise, the first solenoid valve 251 is closed, the second solenoid valve 252 and the third solenoid valve 253 are open, and the third solenoid valve 253 short-circuits the second capillary tube 262 of the second heat exchanger 242. The external heat exchanger 23 serves as an evaporator, and the first heat exchanger 241 and the second heat exchanger 242 are connected in parallel as condensers to supply heat to the corresponding cabinet. The control module 3 can control the electric heating wire 27 to start, further heating the first cabinet 11 where the first heat exchanger 241 is located, and realize dual-temperature zone heating and storage temperature regulation.

[0048] In the dual-temperature zone dual-heat mode, the four-way reversing valve 22 reverses the direction to allow the external heat exchanger 23 to absorb heat. The first heat exchanger 241 and the second heat exchanger 242 are connected in parallel to provide heat. The third solenoid valve 253 short-circuits the second capillary tube 262 to ensure heating efficiency. The electric heating wire 27 can heat the first cabinet 11 independently, realizing the temperature gradient adjustment of the dual cabinets, adapting to the full heating needs in winter, and meeting the storage temperature requirements of different hot foods and drinks.

[0049] Furthermore, in the dual-temperature zone dual-heat mode, the storage temperature of the first cabinet 11 is adjusted by the power of the electric heating wire 27, and can exceed 60°C; the storage temperature of the second cabinet 12 is achieved through heat exchange in the condenser, and the control module 3 controls its temperature to be below 50°C; when only a single cabinet needs heating, the control module 3 closes the solenoid valve 25 corresponding to the other cabinet, stopping the heating function of that cabinet; when one cabinet experiences a sudden temperature drop due to too much low-temperature material, the control module 3 closes the solenoid valve 25 corresponding to the other cabinet, so that the heat from the cooling and heating system is concentrated on that cabinet, and the power of the electric heating wire 27 can be increased simultaneously to achieve rapid heating of a single cabinet.

[0050] The first cabinet 11 can store heat at temperatures exceeding 60°C through power adjustment of the electric heating wire 27. The second cabinet 12 maintains a stable temperature below 50°C through heat exchange via a condenser. The single-cabinet heating function shuts off idle circuits for energy saving. The rapid heating function addresses material cooling issues through centralized heat supply and power enhancement of the electric heating wire 27, ensuring the stability and flexibility of thermal storage in winter and adapting to the storage needs of different types of heat products.

[0051] The constant-temperature display cabinet of the present invention, which is adaptable to various sales scenarios and features a convertible combined cooling and heating mode, is used in the following specific steps: I. Working process of combined cooling and heating mode This mode is suitable for scenarios that require simultaneous cooling and heating, such as outdoor scenic spots and convenience stores in spring and autumn. The core is to control the four-way reversing valve 22 to be in a forward reversing state (the refrigerant flows clockwise) through the control module 3, and achieve a balance between energy saving and high efficiency by switching between the two sub-modes.

[0052] In the first sub-mode operation: the control module 3 controls the first solenoid valve 251 to open, and the second solenoid valve 252 and the third solenoid valve 253 to close, short-circuiting the external heat exchanger 23. At this time, the first heat exchanger 241 is connected in series with the first capillary tube 261, and the second heat exchanger 242 is connected in series with the second capillary tube 262. The refrigerant output from the compressor 21 is diverted by the four-way reversing valve 22 and enters the first heat exchanger 241 (as a condenser) through the first capillary tube 261, releasing heat to the first cabinet 11. Subsequently, the refrigerant flows into the second heat exchanger 242 (as an evaporator), absorbing heat from the second cabinet 12 to achieve cooling. Finally, the refrigerant flows back to the compressor 21 after converging, forming a cycle, providing low-grade cooling and heating, suitable for temperature maintenance.

[0053] Second sub-mode operation: Control module 3 controls the third solenoid valve 253 to open, the first solenoid valve 251 and the second solenoid valve 252 to close, and the first heat exchanger 241 is short-circuited. The refrigerant enters the external heat exchanger 23 (as a condenser) through the four-way reversing valve 22 for efficient heat dissipation, and then flows through the third solenoid valve 253 to the second heat exchanger 242 (as an evaporator) to cool the second cabinet 12; the heat of the first cabinet 11 is provided by the electric heating wire 27 activated by control module 3, which can output high-quality cooling and heating, suitable for rapid temperature increase.

[0054] Mode switching logic: Control module 3 switches between two sub-modes according to actual needs—during energy-saving startup, the first sub-mode is used to adjust the temperature of both cabinets to near the desired temperature, then the second sub-mode is switched to deepen the temperature rise. After the temperature stabilizes, it switches back to the first sub-mode to maintain it. When a large amount of room-temperature material needs to be frozen for a short period of time, the first sub-mode is temporarily switched to the second sub-mode to achieve rapid cooling. In scenarios with frequent power-on and power-off, the second sub-mode is used to quickly raise the temperature, then the first sub-mode is used to maintain it, and subsequent cycles are used to achieve deep cooling. If it is necessary to adjust the temperature of a specific cabinet during operation, the third solenoid valve 253 can be opened and the first solenoid valve 251 and the second solenoid valve 252 can be closed. The compressor 21 only supplies cooling to the second cabinet 12, and the temperature of the first cabinet 11 is independently controlled by the electric heating wire 27.

[0055] II. Working process of dual-temperature zone dual-cooling mode This mode is suitable for scenarios that only require cooling, such as outdoor scenic spots in summer and convenience stores all year round. The core is to control the four-way reversing valve 22 through the control module 3 to maintain the positive reversing state, focusing on the cooling supply and temperature differentiation of the dual cabinets.

[0056] Basic cooling operation: Control module 3 controls the first solenoid valve 251 to close, and the second solenoid valve 252 and the third solenoid valve 253 to open. The third solenoid valve 253 short-circuits the second capillary tube 262 of the second heat exchanger 242. The refrigerant enters the external heat exchanger 23 (as a condenser) through the four-way reversing valve 22 to undertake all the heat dissipation tasks, and then is distributed to the first heat exchanger 241 and the second heat exchanger 242 (both as evaporators) to supply cooling to the first cabinet 11 and the second cabinet 12 respectively, maintaining the same low temperature in both cabinets.

[0057] Dual-temperature zone regulation: After stable operation, the control module 3 intermittently closes the second solenoid valve 252 or the third solenoid valve 253, and adjusts the working time of the corresponding heat exchanger in conjunction with the start and stop frequency of the compressor 21, so as to realize the free adjustment of the cold storage temperature of the first cabinet 11 and the second cabinet 12 (such as one for cold drink refrigeration and the other for ice cream freezing).

[0058] Energy-saving operation: If only a single cabinet needs cooling, the control module 3 closes the solenoid valve corresponding to the other cabinet (closing the second solenoid valve 252 stops the cooling of the second cabinet 12, and closing the third solenoid valve 253 stops the cooling of the first cabinet 11), cutting off the cooling circuit of the idle cabinet and reducing energy waste; if a cabinet experiences a sudden temperature rise due to too much high-temperature material, the solenoid valve corresponding to the other cabinet can be closed, allowing the cooling system to concentrate its cooling capacity on that cabinet and achieve rapid cooling.

[0059] III. Working Process of Dual-Temperature Zone Dual-Heat Mode This mode is suitable for scenarios where only heating is needed, such as outdoor scenic spots in winter and daily use in convenience stores. The core is to control the four-way reversing valve 22 to be in the reverse reversing state (the refrigerant flows counterclockwise) through the control module 3. Combined with the heat exchanger heating and the electric heating wire to assist in heating, the heat supply and temperature gradient adjustment of the dual cabinets are realized.

[0060] Basic heating operation: Control module 3 controls the first solenoid valve 251 to close, and the second solenoid valve 252 and the third solenoid valve 253 to open. The third solenoid valve 253 short-circuits the second capillary tube 262 of the second heat exchanger 242. The external heat exchanger 23 acts as an evaporator to absorb heat from the outside. The high-temperature refrigerant compressed by the compressor 21 is diverted to the first heat exchanger 241 and the second heat exchanger 242 (both acting as condensers), releasing heat to the first cabinet 11 and the second cabinet 12 respectively, maintaining the same temperature in both cabinets.

[0061] Dual-temperature zone regulation: After stable operation, the control module 3 starts the electric heating wire 27 in the first cabinet 11. By adjusting the power of the electric heating wire 27, the temperature of the first cabinet 11 is raised to above 60°C (to meet the high temperature heat storage requirements); the second cabinet 12 maintains the temperature below 50°C (usually around 40°C) through heat exchange with the condenser, forming a dual-temperature zone heat storage.

[0062] Energy saving and emergency regulation: If only a single cabinet needs heating, the control module 3 closes the solenoid valve corresponding to the other cabinet, cutting off the heating circuit of the idle cabinet; if a cabinet experiences a sudden temperature drop due to too much low-temperature material, the solenoid valve corresponding to the other cabinet can be closed, allowing the heating system to concentrate heat supply to that cabinet and simultaneously increase the power of the electric heating wire 27 to achieve rapid heating of a single cabinet.

[0063] IV. The Process of Switching Between Scenario-Based Modes Outdoor scene integration in scenic areas: When the equipment is powered off at night in spring and autumn and started on weekdays, control module 3 first uses the second sub-mode of the combined heating and cooling mode to quickly raise the temperature (heating box heating, cooling box cooling), and then switches to the first sub-mode to maintain the temperature after it stabilizes; in winter and summer, the dual-temperature zone dual-heating or dual-cooling modes are directly started respectively, and the solenoid valve is dynamically adjusted according to the material quantity and temperature changes.

[0064] Convenience store scenario integration: In spring and autumn, a daytime working mode (combined heating and cooling mode) and a nighttime storage mode (dual-temperature zone dual-cooling mode) are set. When materials in the heated box need to be refrigerated at night, the control module 3 automatically switches to the dual-temperature zone dual-cooling mode. In summer, the dual-temperature zone dual-cooling mode is used throughout the year. In winter, the dual-temperature zone dual-heating mode is used during the day and switched to the dual-temperature zone dual-cooling mode as needed at night. When switching throughout the year, in spring, the power of the electric heating wire 27 is gradually reduced from the dual-heating mode, the first solenoid valve 251 is closed, and the second solenoid valve 252 and the third solenoid valve 253 are opened to switch to the combined heating and cooling mode, and then transition to the summer dual-cooling mode. In autumn, the operation is reversed. In winter, the second solenoid valve 252 and the third solenoid valve 253 are closed, and the four-way reversing valve 22 is switched to the reverse to switch to the dual-heating mode. The entire process achieves unattended automated switching.

[0065] Finally, it should be noted that the electronic components in the cooling and heating system 2 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A convertible cold and hot co-generation mode merchandising case adapted to a selling scenario, characterized in that: The cabinet body assembly (1), the refrigeration and heating system (2) and the control module (3) are included. The cabinet body assembly (1) includes two independent heat preservation cabinet bodies, namely a first cabinet body (11) and a second cabinet body (12); the refrigeration and heating system (2) includes a compressor (21), a four-way reversing valve (22), an external heat exchanger (23), two internal heat exchangers (24), three electromagnetic valves (25), two capillary tubes (26) and an electric heating wire (27); the internal heat exchanger (24) includes a first heat exchanger (241) and a second heat exchanger (242), the electromagnetic valve (25) includes a first electromagnetic valve (251), a second electromagnetic valve (252) and a third electromagnetic valve (253), and the capillary tube (26) includes a first capillary tube (261) and a second capillary tube (262).

2. The convertible cold and hot hydronic mode merchandising case adapted to the selling scenario of claim 1, wherein: The first heat exchanger (241) is correspondingly arranged in the first cabinet body (11), the second heat exchanger (242) is correspondingly arranged in the second cabinet body (12), and the electric heating wire (27) is arranged in the first cabinet body (11).

3. The convertible cold and hot hydronic mode merchandising case adapted to sell scenarios of claim 1, wherein: The output end of the compressor (21) is connected with the input end of the four-way reversing valve (22), the first output end of the four-way reversing valve (22) is connected with one end of the external heat exchanger (23) and one end of the first electromagnetic valve (251) respectively, the other end of the external heat exchanger (23) is connected with the first heat exchanger (241), the third electromagnetic valve (253) and one end of the second capillary tube (262) through the first capillary tube (261) simultaneously, the third electromagnetic valve (253) and the other end of the second capillary tube (262) are connected to the second heat exchanger (242) after being connected in parallel, the second output end of the four-way reversing valve (22) is directly connected with the other end of the second heat exchanger (242), and is connected with the other end of the first heat exchanger (241) through the second electromagnetic valve (252) simultaneously, the other end of the first electromagnetic valve (251) is connected with the other end of the second heat exchanger (242) after being connected in parallel, and is connected with the second output end of the four-way reversing valve (22), and the output end of the four-way reversing valve (22) is connected with the input end of the compressor (21).

4. The convertible cold and hot hydronic mode merchandising case adapted to sell scenarios of claim 1, wherein: The control module (3) is electrically connected with the four-way reversing valve (22), the three electromagnetic valves (25), the compressor (21) and the electric heating wire (27) respectively, the switching of three modes of cold and hot combined supply, double-temperature-zone double cold and double-temperature-zone double heat is realized by controlling the reversing state of the four-way reversing valve (22), the on-off state of the three electromagnetic valves (25) and the start-stop of the compressor (21) and the electric heating wire (27), and the two independent heat preservation cabinet bodies can realize double-temperature-zone heat preservation in each mode.

5. The convertible cold and hot hydronic mode merchandising case adapted to sell scenarios of claim 4, wherein: The cold and hot combined supply mode includes two sub-modes, and the specific implementation manner is that the control module (3) controls the four-way reversing valve (22) to be in a forward reversing state, and the refrigerant flows clockwise. The first sub-mode: the control module (3) controls the first electromagnetic valve (251) to open, and the second electromagnetic valve (252) and the third electromagnetic valve (253) to close; due to the throttling effect of the first capillary (261) and the external heat exchanger (23) being much greater than that of the first heat exchanger (241), the external heat exchanger (23) is short-circuited; the first heat exchanger (241) is connected with the second heat exchanger (242) through the second capillary (262); the first heat exchanger (241) serves as a condenser to supply energy to the first cabinet (11); and the second heat exchanger (242) serves as an evaporator to supply cold to the second cabinet (12); The second sub-mode: the control module (3) controls the third electromagnetic valve (253) to open, and the first electromagnetic valve (251) and the second electromagnetic valve (252) to close; the first heat exchanger (241) is short-circuited; the external heat exchanger (23) serves as a condenser to dissipate heat; the second heat exchanger (242) serves as an evaporator to supply cold to the second cabinet (12); and the heat of the first cabinet (11) is provided by the electric heating wire (27); The control module (3) can control the switching of the first sub-mode and the second sub-mode according to the operation requirements, so as to realize the energy-saving start-up, rapid cooling or rapid cooling and deep cooling operation logic.

6. The convertible cold and heat supply mode constant-temperature display cabinet adapted to the sales scene according to claim 5, characterized in that: The energy-saving start-up logic is that the control module (3) controls the device to operate in the first sub-mode first, adjusts the temperature in the cabinet to the vicinity of the expected temperature, switches to the second sub-mode to continue to draw heat, and switches back to the first sub-mode to maintain the temperature after the temperature is stable; The rapid cooling logic is that when a large amount of normal-temperature materials are put into the cabinet for a short time and need to be frozen, the control module (3) controls the device to temporarily switch from the first sub-mode to the second sub-mode for rapid heat drawing; The rapid cooling and deep cooling logic is that for the frequent on-off scene, the control module (3) controls the device to rapidly draw heat in the second sub-mode first, and then switches to the first sub-mode to maintain the temperature, and subsequently switches the first sub-mode and the second sub-mode cyclically according to the requirements.

7. The convertible cold and hot hydronic mode merchandising case adapted to sell scenarios of claim 4, wherein: The implementation of the double-temperature-zone double-cooling mode is that: The control module (3) controls the four-way reversing valve (22) to be in the forward reversing state, the first electromagnetic valve (251) to be closed, the second electromagnetic valve (252) and the third electromagnetic valve (253) to be opened, and the third electromagnetic valve (253) to short-circuit the second capillary (262) of the second heat exchanger (242); The external heat exchanger (23) serves as a condenser to undertake the heat dissipation task, and the first heat exchanger (241) and the second heat exchanger (242) are connected in parallel to serve as evaporators to supply cold to the corresponding cabinets; The control module (3) can control the second electromagnetic valve (252) and the third electromagnetic valve (253) to be closed to make the second heat exchanger (242) or the first heat exchanger (241) operate alone, so as to realize the double-temperature-zone freezing and temperature storage adjustment.

8. The convertible cold and hot combined supply mode merchandising case adapted to selling scenarios according to claim 7, characterized in that: In the double-temperature-zone double-cold mode, the control module (3) realizes free adjustment of the cold storage temperature of two independent cabinets by intermittently closing the second electromagnetic valve (252) or the third electromagnetic valve (253) and coordinating the start-stop frequency of the compressor (21); when only single-cabinet refrigeration is needed, the control module (3) closes the electromagnetic valve (25) corresponding to the other cabinet to stop the refrigeration function of the cabinet.

9. The convertible cold and hot hydronic mode merchandising case adapted to sell scenarios of claim 4, wherein: The double-temperature-zone double-heat mode is realized in the following manner: The control module (3) controls the four-way reversing valve (22) to be in the reverse reversing state, the refrigerant flows counterclockwise, the first electromagnetic valve (251) is closed, the second electromagnetic valve (252) and the third electromagnetic valve (253) are opened, and the third electromagnetic valve (253) short-circuits the second capillary (262) of the second heat exchanger (242); The external heat exchanger (23) serves as an evaporator, and the first heat exchanger (241) and the second heat exchanger (242) are connected in parallel and serve as a condenser to supply heat to the corresponding cabinet; The control module (3) can control the electric heating wire (27) to start, further increase the temperature of the first cabinet (11) where the first heat exchanger (241) is located, and realize double-temperature-zone heating and temperature storage adjustment.

10. The convertible cold and hot combined supply mode merchandising case adapted to selling scenarios of claim 9, wherein: In the double-temperature-zone double-heat mode, the temperature storage temperature of the first cabinet (11) is adjusted by the power of the electric heating wire (27) and can be as high as over 60℃; the temperature storage temperature of the second cabinet (12) is realized by condenser heat exchange, and the control module (3) controls the temperature to be lower than 50℃; when only single-cabinet heating is needed, the control module (3) closes the electromagnetic valve (25) corresponding to the other cabinet to stop the heating function of the cabinet; when one of the cabinets has a sudden temperature drop due to the placement of too much low-temperature material, the control module (3) closes the electromagnetic valve (25) corresponding to the other cabinet to make the heat of the refrigeration and heating system concentratedly supplied to the cabinet, and the power of the electric heating wire (27) can be simultaneously increased to realize rapid temperature increase of the single cabinet.

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