A refrigerator

Abstract

The application relates to the refrigeration technical field and discloses a refrigerator, which comprises a cabinet body, a refrigeration cycle system, a cabinet door, an inner circulation pipeline, a first circulation power element and a main control unit, and a refrigeration chamber is defined in the refrigerator; the cabinet door comprises a door frame, an inner layer glass plate and an outer layer glass plate forming a sandwich, and the sandwich is filled with liquid working medium; the inner circulation pipeline is assembled on the inner surface of the outer layer glass plate, the inlet end of the inner circulation pipeline is connected to the upper part of the sandwich, and the outlet end of the inner circulation pipeline is connected to the lower part of the sandwich; the first circulation power element is connected to the inner circulation pipeline; and the main control unit is configured to: when the refrigeration cycle system is in a shutdown mode, the first circulation power element is controlled to be started, so that the liquid working medium in the sandwich is circulated from bottom to top through the inner circulation pipeline. The application can control the liquid working medium circulation system to work during the shutdown of the compressor, slow down the temperature rising speed of the compartment in the cabinet, reduce the temperature fluctuation of the compartment, reduce the temperature difference between the upper part and the lower part of the compartment, and improve the storage environment of the compartment in the cabinet.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a freezer. Background Technology

[0002] For high-end wine cabinets with glass doors, the most important issue to address is the overall heat load and its fluctuations.

[0003] Analyzing the insulation performance of wine cabinets, the glass door is undoubtedly the weakest link that urgently needs improvement. The glass door itself has very poor insulation and energy storage capacity, allowing ambient heat to easily penetrate the cabinet interior. During compressor shutdown periods, this causes a rapid rise in compartment temperature, resulting in large temperature fluctuations and significant temperature differences between the top and bottom of the compartment. Current methods generally involve reducing compressor downtime and running the compressor at low speeds for extended periods under low heat load conditions.

[0004] However, this method is prone to user complaints about continuous compressor and fan noise, and the compressor running for a long time is very detrimental to the defrosting of the whole machine (the compressor needs to be stopped during defrosting).

[0005] Therefore, existing technologies urgently need improvement. Summary of the Invention

[0006] The purpose of this invention is to provide a freezer that solves the technical problem of large temperature fluctuations and large temperature differences between the top and bottom of the freezer compartments in existing freezers with glass doors during compressor shutdown.

[0007] To achieve the above objectives, the present invention provides a freezer, comprising:

[0008] The cabinet contains a defined cooling chamber.

[0009] A refrigeration cycle system, which is installed inside the cabinet, has an on-state mode and an off-state mode; when the refrigeration cycle system is in the on-state mode, it refrigerates the refrigeration chamber.

[0010] The cabinet door is movably connected to the cabinet body and is used to open and close the refrigeration chamber. The cabinet door includes a door frame, an inner glass panel, and an outer glass panel. The middle part of the inner glass panel and the outer glass panel is a visible area, and the outer periphery is a screen-printed area for assembly with the door frame. A sandwich is formed between the inner glass panel and the outer glass panel, and the sandwich is filled with a liquid working fluid.

[0011] An internal circulation pipe is installed on the inner surface of the outer glass plate at a position corresponding to the screen-printed area; the inlet end of the internal circulation pipe is connected to the upper part of the interlayer, and the outlet end of the internal circulation pipe is connected to the lower part of the interlayer.

[0012] The first circulating power component is connected to the internal circulation pipeline and is used to drive the flow of liquid working fluid;

[0013] The main control unit, which is electrically connected to the refrigeration cycle system and the first cycle power component, is configured as follows:

[0014] When the refrigeration cycle system is in shutdown mode, the first circulation power component is started, so that the liquid working fluid in the interlayer forms a bottom-up circulation through the internal circulation pipeline.

[0015] In some embodiments of this application, it further includes:

[0016] Internal piping, which is installed inside the cabinet;

[0017] A liquid replenishment tube is installed on the inner surface of the outer glass plate at a position corresponding to the screen-printed area. The first end of the liquid replenishment tube passes through the door frame and connects to the pipes inside the cabinet. The second end of the liquid replenishment tube is connected to the lower part of the interlayer and is used to fill the interlayer with liquid working fluid.

[0018] A drain pipe is installed on the inner surface of the outer glass plate at a position corresponding to the screen-printed area. The first end of the drain pipe passes through the door frame and connects to the pipes inside the cabinet.

[0019] The second circulating power component is connected to the external circulation pipeline consisting of the internal pipeline, the replenishment pipeline and the drain pipeline, and is used to drive the flow of the liquid working fluid.

[0020] An electric valve is connected to the second end of the internal circulation pipeline and the drain pipe. The electric valve is used to control the opening and closing of the internal circulation pipeline and the drain pipe.

[0021] In some embodiments of this application, the main control unit is electrically connected to the electric valve and the second circulating power component, and the main control unit is configured as follows:

[0022] Before the interlayer is filled with liquid working fluid, the electric valve is controlled to switch to the state where the internal circulation pipeline is closed and the drain pipe is open. The second circulation power unit is then started, so that the liquid working fluid is injected into the interlayer from the replenishment pipe until liquid working fluid is discharged from the drain pipe. After that, the second circulation power unit is stopped, and the electric valve is controlled to switch to the state where the internal circulation pipeline is open and the drain pipe is closed.

[0023] In some embodiments of this application, it further includes:

[0024] The first sensor is used to detect the current ambient humidity and ambient temperature;

[0025] The second sensor is used to detect the first temperature at the bottom of the cabinet door;

[0026] The refrigeration cycle system includes a compressor, a condenser, and connecting pipes that connect the outlet end of the compressor and the inlet end of the condenser, respectively.

[0027] The internal piping passes around the condenser, causing the temperature of the liquid working fluid flowing through the internal piping to rise before flowing into the replenishment pipe.

[0028] In some embodiments of this application, the main control unit is electrically connected to the first sensor and the second sensor, and the main control unit is configured to:

[0029] The current dew point temperature is obtained by measuring the ambient humidity and ambient temperature. When the first temperature is not higher than the dew point temperature, the electric valve is controlled to switch to the state where the internal circulation pipeline is closed and the drain pipe is open. The second circulation power component is then started, so that the liquid working fluid with rising temperature flowing through the pipeline inside the cabinet is injected into the jacket through the replenishment pipe and forms a bottom-up circulation through the external circulation pipeline.

[0030] In some embodiments of this application, it further includes:

[0031] The first sensor is used to detect ambient humidity and ambient temperature;

[0032] The second sensor is used to detect the first temperature at the bottom of the cabinet door;

[0033] A heating component, located in the lower part of the interlayer, is used to heat the liquid working fluid.

[0034] In some embodiments of this application, the main control unit is electrically connected to the first sensor, the second sensor, and the heating assembly, and the main control unit is configured to:

[0035] The current dew point temperature is obtained by measuring the ambient humidity and ambient temperature. When the first temperature is not higher than the dew point temperature, the heating component is controlled to operate, the electric valve is controlled to switch to the state where the internal circulation pipeline is open and the drain pipe is closed, and the first circulation power component is controlled to start, so that the liquid working fluid in the interlayer forms a bottom-up circulation through the internal circulation pipeline.

[0036] In some embodiments of this application, the main control unit is configured as follows:

[0037] When the first temperature is 2°C higher than the dew point temperature, the heating component is controlled to stop operating.

[0038] In some embodiments of this application, the first sensor is a temperature and humidity sensor, which is disposed on the top of the cabinet;

[0039] The second sensor is a temperature sensor, which is located at the bottom of the cabinet door.

[0040] In some embodiments of this application, a hinge hole is provided on the upper part of the door frame, and the first end of the replenishment pipe and the first end of the drain pipe both pass through the hinge hole to exit the door frame.

[0041] Compared with the prior art, the advantages of the freezer provided in this embodiment of the invention are as follows:

[0042] This invention controls the operation of the liquid working fluid circulation system during compressor shutdown, causing the liquid working fluid within the cabinet door interlayer to circulate from bottom to top, forming a flowing "liquid curtain." This effectively reduces the impact of external radiant heat on the temperature of the cabinet compartments, slows down the rate of temperature rise, and thus reduces temperature fluctuations within the cabinet compartments. Simultaneously, because the flowing "liquid curtain" balances the temperature difference between the top and bottom of the cabinet door, it effectively reduces the temperature difference between the top and bottom of the cabinet compartments, improving the storage environment within the cabinet compartments. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a cross-sectional structural diagram of a glass cabinet door in the prior art;

[0045] Figure 2 This is a schematic diagram of the screen-printed area and visible area of ​​the inner or outer glass plate;

[0046] Figure 3 This is a schematic diagram of the inner surface structure of the outer glass plate in Example 1. Figure 1 ;

[0047] Figure 4 This is a schematic diagram of the inner surface structure of the outer glass plate in Example 1. Figure 2 ;

[0048] Figure 5 This is a schematic diagram of the inner surface structure of the outer glass plate in Example 2;

[0049] Figure 6 This is a schematic diagram of the inner surface structure of the outer glass plate in Example 3;

[0050] Figure 7 This is a front view structural diagram of the cabinet in Example 3;

[0051] Figure 8This is a schematic diagram of the internal piping layout in Example 3;

[0052] Figure 9 This is a schematic diagram of the inner surface structure of the outer glass plate in Example 4;

[0053] Figure 10 This is a flowchart of the liquid working fluid filling process through an external circulation pipeline, as described in Example 2 or Example 4;

[0054] Figure 11 This is the control flowchart of the heating tube in Example 4. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] See Figure 2-10The freezer of the present invention mainly includes a cabinet body, a cabinet door, a refrigeration circulation system, a liquid working fluid circulation system, and a main control unit.

[0060] The cabinet includes an outer shell 110 and an inner liner 120 disposed within the outer shell 110. An installation space is formed between the outer shell 110 and the inner liner 120. The installation space is used to install the structural components of the freezer and to form a foamed insulation layer. A refrigeration chamber is defined within the inner liner 120.

[0061] The cabinet door is movably connected to the cabinet body and is used to open and close the refrigeration chamber. The cabinet door of this invention includes a door frame 210, an inner glass panel 220, and an outer glass panel 230. The middle portion of the inner glass panel 220 and the outer glass panel 230 is a visible area 201, and the outer periphery is a silkscreened area 202 for assembly with the door frame 210. See also... Figure 2 , Figure 2 This is a schematic diagram of the inner glass plate 220 or the outer glass plate 230. The visible area 201 and the silkscreen area 202 are divided by dashed lines, and the silkscreen area 202 is indicated by diagonal lines. A sandwich layer 203 is formed between the inner glass plate 220 and the outer glass plate 230, and the sandwich layer 203 is filled with liquid working fluid.

[0062] Figure 1 The image shown is a cross-sectional view of a prior art glass cabinet door. The prior art glass cabinet door mainly includes a door frame 210, an inner glass panel 220, an outer glass panel 230, a door seal 4, a heater 5, a heat-reflective film 6, and a concealed handle 7 formed on the side of the door frame 210. The assembly structure of the door frame 210, the inner glass panel 220, and the outer glass panel 230, as well as the formed interlayer 203 of the present invention, can be referenced. Figure 1 .

[0063] The refrigeration cycle system is located inside the cabinet and has on-time and off-time modes. When in on-time mode, the refrigeration cycle system cools the refrigeration chamber. The refrigeration cycle system generally includes components such as a compressor 300, condenser, dryer filter, capillary tube, and evaporator, all connected by piping. When the refrigeration cycle system is in on-time mode, i.e., the compressor 300 is running, the refrigeration cycle system's operation includes compression, condensation, throttling, and evaporation processes. Specifically, the compression process is as follows: after the freezer's power cord is plugged in, and the freezer has a cooling demand, the compressor 300 starts working. Low-temperature, low-pressure refrigerant from the evaporator is drawn into the compressor 300 and compressed into high-temperature, high-pressure superheated gas within the compressor 300 cylinder before being discharged into the condenser. The condensation process is as follows: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser, its temperature continuously decreasing until it is gradually cooled to room-temperature, high-pressure saturated vapor, and further cooled to saturated liquid. The temperature then no longer decreases, and the refrigerant pressure remains almost constant throughout the condensation process. The throttling process is as follows: After condensation, the saturated liquid refrigerant flows into the capillary tube after being filtered to remove moisture and impurities through a dryer filter. The capillary tube then throttles and reduces pressure, transforming the refrigerant into a low-pressure, room-temperature wet vapor. The evaporation process is as follows: The low-pressure, room-temperature wet vapor enters the evaporator, absorbs heat, and vaporizes, lowering the temperature of the evaporator and its surroundings, thus achieving cooling in the refrigeration chamber and turning the refrigerant into a low-temperature, low-pressure gas. The refrigerant exiting the evaporator returns to the compressor 300, repeating the above process. Energy conversion occurs through the state change of the refrigerant, transferring heat from inside the freezer to the outside air, thereby achieving the refrigeration cycle of the freezer. When the evaporator is located on the wall of the refrigeration chamber, it is a direct-cooling freezer; when the evaporator is located within the freezer's air duct, it is an air-cooling freezer. The above-described structural design and operating principle of the freezer refrigeration cycle system are existing technologies and will not be elaborated upon in this application.

[0064] The main control unit (not shown in the figure) is electrically connected to the refrigeration cycle system and the liquid working fluid circulation system. The main control unit can be a main control board installed inside the cabinet to control the various functions of the freezer.

[0065] The liquid working fluid circulation system is used to circulate the liquid working fluid in the interlayer 203 from bottom to top.

[0066] The liquid working fluid circulation system has various setup methods and operating modes, which are illustrated below through specific examples.

[0067] Example 1

[0068] See Figure 3-4 The liquid working fluid circulation system in this embodiment includes an internal circulation pipeline 510 and a first circulation power component 520. In this embodiment, the interlayer 203 is filled with liquid working fluid before the freezer undergoes its first cooling operation.

[0069] The internal circulation pipe 510 is installed on the inner surface of the outer glass plate 230 at the position corresponding to the silkscreen area 202, so that the internal circulation pipe 510 cannot be seen from the front of the cabinet door, which helps to improve the aesthetics of the cabinet door.

[0070] The inlet end of the internal circulation pipe 510 is connected to the upper part of the interlayer 203 near the top, and the outlet end of the internal circulation pipe 510 is connected to the lower part of the interlayer 203 near the bottom. The inlet end and the outlet end of the internal circulation pipe 510 are located on both sides of the interlayer 203, respectively.

[0071] The first circulation power unit 520 is connected to the inner circulation pipeline 510 and is used to drive the circulation flow of the liquid working fluid. The first circulation power unit 520 is electrically connected to the main control unit and is controlled by the main control unit to start and stop.

[0072] The main control unit is configured as follows:

[0073] When the refrigeration cycle system is in shutdown mode (when the freezer stops refrigerating), the first cycle power component 520 is started, causing the liquid working fluid in the interlayer 203 to circulate from bottom to top.

[0074] When the refrigeration cycle system is in the start-up mode (when the freezer is refrigerating), the first cycle power component 520 can be controlled to start and run continuously, or the first cycle power component 520 can be controlled to start and run intermittently according to a preset mode. The preset mode can be set according to the ambient temperature.

[0075] Due to the cooling effect of the liquid working fluid (such as pure water), the temperature rise of the cabinet door is small during the compressor 300 shutdown period (when the freezer stops cooling), thus reducing temperature fluctuations inside the refrigeration chamber. At the same time, the upward flow of the liquid working fluid balances the temperature difference between the top and bottom of the cabinet door, thereby improving the temperature difference between the top and bottom of the refrigeration chamber and significantly improving the storage environment inside the refrigeration chamber.

[0076] In this embodiment, the liquid working fluid is pure water, and the first circulation power component 520 is a water pump.

[0077] The liquid working fluid circulation system proposed in this embodiment has a simple structure. During compressor shutdown, the system can be controlled to circulate the liquid working fluid within the cabinet door interlayer, creating a flowing "liquid curtain." This effectively reduces the impact of external radiant heat on the temperature of the cabinet compartments, slows down the rate of temperature rise, and thus reduces temperature fluctuations within the compartments. Simultaneously, the flowing "liquid curtain" balances the temperature difference between the upper and lower parts of the cabinet door, effectively reducing the temperature difference within the cabinet compartments and improving the storage environment.

[0078] Example 2

[0079] See Figure 5This embodiment is an improvement based on embodiment 1. In this embodiment, the liquid working fluid can be injected through an external circulation pipeline.

[0080] The liquid working fluid circulation system of this embodiment includes an internal circulation pipeline 510, a first circulation power component 520, a replenishment pipeline 550, a drain pipeline 560, internal pipelines, an electric valve 570, and a second circulation power component (not shown in the figure).

[0081] The internal circulation pipe 510 is installed on the inner surface of the outer glass plate 230 at the position corresponding to the silkscreen area 202, so that the internal circulation pipe 510 cannot be seen from the front of the cabinet door, which helps to improve the aesthetics of the cabinet door.

[0082] The inlet end of the internal circulation pipe 510 is connected to the upper part of the interlayer 203 near the top, and the outlet end of the internal circulation pipe 510 is connected to the lower part of the interlayer 203 near the bottom. The inlet end and the outlet end of the internal circulation pipe 510 are located on both sides of the interlayer 203, respectively.

[0083] The first circulation power unit 520 is connected to the inner circulation pipeline 510 and is used to drive the circulation flow of the liquid working fluid. The first circulation power unit 520 is electrically connected to the main control unit and is controlled by the main control unit to start and stop.

[0084] The piping inside the cabinet is located inside the cabinet (not shown in the figure).

[0085] Hinges are provided on the door frame 210 (not shown in the figure).

[0086] The replenishment tube 550 is mounted on the inner surface of the outer glass plate 230 at the position corresponding to the silkscreen area 202. The first end of the replenishment tube 550 passes through the hinge hole of the door frame 210 and is connected to the internal piping of the cabinet. The second end of the replenishment tube 550 is connected to the lower part of the interlayer 203 near the bottom, for filling the interlayer 203 with liquid working fluid.

[0087] The drain pipe 560 is fitted onto the inner surface of the outer glass plate 230 at the position corresponding to the silkscreen area 202. The first end of the drain pipe 560 passes through the hinge hole of the door frame 210 and connects to the piping inside the cabinet.

[0088] The internal piping, replenishment pipe 550, and drain pipe 560 constitute the external circulation piping. The second circulation power unit is connected to the external circulation piping to drive the flow of the liquid working fluid. The second circulation power unit is electrically connected to the main control unit and is controlled by the main control unit to start and stop.

[0089] The electric valve 570 is connected to the second end of the internal circulation pipeline 510 and the drain pipe 560. The electric valve 570 is used to control the opening and closing of the internal circulation pipeline 510 and the drain pipe 560. The electric valve 570 is electrically connected to the main control unit, which controls the switching between the internal circulation pipeline 510 and the external circulation pipeline.

[0090] The specific layout of the internal piping corresponds to the structure of the freezer. The second circulation power component is a water pump, which is configured according to the structure of the internal piping. However, based on the structure of this embodiment, it can be seen that the internal piping has at least two pipes. One pipe is connected to the first end of the replenishment pipe 550 and the liquid working medium source at both ends, respectively, so that the liquid working medium can be injected into the interlayer 203 through the second end of the replenishment pipe 550. The other pipe is connected to the first end of the drain pipe 560 and the outside at both ends, so that the drain pipe 560 can be connected to the outside.

[0091] In this embodiment, the liquid working fluid is pure water, and the first circulation power component 520 is a water pump.

[0092] The main control unit is configured as follows:

[0093] Before the interlayer is filled with liquid working fluid, the electric valve 570 is switched to the state where the internal circulation pipeline 510 is closed and the drain pipe 560 is open (i.e., switched to the external circulation pipeline). The second circulation power unit is started, so that the liquid working fluid is injected from the replenishment pipe 550 into the interlayer 203 of the cabinet door until the liquid working fluid is discharged from the drain pipe 560. Then the second circulation power unit is stopped and the electric valve 570 is switched to the state where the internal circulation pipeline 510 is open and the drain pipe 560 is closed.

[0094] The flowchart of the above filling steps is as follows: Figure 10 As shown.

[0095] During the above-described filling steps, the liquid replenishment pipe 550 fills the interlayer 203 with liquid working fluid from the bottom, gradually filling the interlayer 203 from bottom to top. The drain pipe 560 is connected to the outside. When liquid working fluid is filled into the interlayer 203, the gas inside the interlayer 203 is discharged to the outside through the drain pipe 560. When liquid working fluid is discharged from the drain pipe 560, it indicates that the interlayer 203 is full of liquid working fluid. At this time, the filling step can be stopped, and the internal circulation pipe 510 can be switched. After the freezer enters the cooling mode, the liquid working fluid circulation system is started. The method of controlling the start of the liquid working fluid circulation system can be the same as in Example 1, and will not be described again in this example.

[0096] The liquid working fluid circulation system proposed in this embodiment has a simple structure and can be filled with liquid working fluid through an external circulation pipeline.

[0097] Furthermore, the liquid working fluid circulation system proposed in this embodiment can be controlled to operate during compressor shutdown, causing the liquid working fluid in the cabinet door interlayer to circulate from bottom to top, thus forming a flowing "liquid curtain." This effectively reduces the impact of external radiant heat on the temperature of the cabinet compartment, slows down the rate of temperature rise in the cabinet compartment, and thus reduces temperature fluctuations in the cabinet compartment. Simultaneously, because the flowing "liquid curtain" balances the temperature difference between the top and bottom of the cabinet door, it effectively reduces the temperature difference between the top and bottom of the cabinet compartment, improving the storage environment within the cabinet compartment.

[0098] Example 3

[0099] See Figure 6-8 This embodiment is an improvement based on embodiment 2. This embodiment can utilize condensation heat to improve the anti-condensation of the cabinet door.

[0100] The liquid working fluid circulation system of this embodiment includes an internal circulation pipeline 510, a first circulation power component 520, a temperature and humidity sensor 530, a temperature sensor 540, a replenishment pipe 550, a drain pipe 560, an internal pipeline 580, an electric valve 570, a second circulation power component (not shown in the figure), and a storage box 130.

[0101] The internal circulation pipe 510 is installed on the inner surface of the outer glass plate 230 at the position corresponding to the silkscreen area 202, so that the internal circulation pipe 510 cannot be seen from the front of the cabinet door, which helps to improve the aesthetics of the cabinet door.

[0102] The inlet end of the internal circulation pipe 510 is connected to the upper part of the interlayer 203 near the top, and the outlet end of the internal circulation pipe 510 is connected to the lower part of the interlayer 203 near the bottom. The inlet end and the outlet end of the internal circulation pipe 510 are located on both sides of the interlayer 203, respectively.

[0103] The first circulation power unit 520 is connected to the inner circulation pipeline 510 and is used to drive the circulation flow of the liquid working fluid. The first circulation power unit 520 is electrically connected to the main control unit and is controlled by the main control unit to start and stop.

[0104] See Figure 7 The temperature and humidity sensor 530 is located on the top of the cabinet (outer shell 110). The temperature and humidity sensor 530 is electrically connected to the main control unit and is used to detect the ambient humidity and ambient temperature.

[0105] See Figure 6 Temperature sensor 540 is located at the bottom of the cabinet door (outer glass panel 230). Temperature sensor 540 is electrically connected to the main control unit and is used to detect the first temperature at the bottom of the cabinet door.

[0106] Hinge holes (not shown in the figure) are provided on the door frame 210. See also Figure 7The outer casing 110 is also provided with hinge mounting holes 111, and the hinge holes of the door frame 210 correspond to the hinge mounting holes 111 (the hinge holes in embodiment 3 are the same as the hinge holes in this embodiment).

[0107] See Figure 6 The replenishment tube 550 is mounted on the inner surface of the outer glass plate 230 at a position corresponding to the silkscreen area 202. The first end of the replenishment tube 550 passes through the hinge hole of the door frame 210 and connects to the pipe 580 inside the cabinet. The second end of the replenishment tube 550 is connected to the lower part of the interlayer 203 near the bottom, for filling the interlayer 203 with liquid working fluid.

[0108] See Figure 6 The drain pipe 560 is fitted onto the inner surface of the outer glass plate 230 at a position corresponding to the silkscreen area 202. The first end of the drain pipe 560 passes through the hinge hole of the door frame 210 and connects to the pipe 580 inside the cabinet.

[0109] The internal piping 580, replenishment pipe 550, and drain pipe 560 constitute the external circulation piping. The second circulation power unit is connected to the external circulation piping and is used to drive the flow of the liquid working fluid. The second circulation power unit is electrically connected to the main control unit and is controlled by the main control unit to start and stop. The second circulation power unit is a water pump, which is configured according to the structure of the internal piping 580.

[0110] The electric valve 570 is connected to the second end of the internal circulation pipeline 510 and the drain pipe 560. The electric valve 570 is used to control the opening and closing of the internal circulation pipeline 510 and the drain pipe 560. The electric valve 570 is electrically connected to the main control unit, which controls the switching between the internal circulation pipeline 510 and the external circulation pipeline.

[0111] See Figure 7 The storage box 130 is disposed in the refrigeration chamber, and the liquid working fluid is purified water. The storage box 130 stores purified water and can be connected to an external water inlet pipe (not shown in the figure) to replenish purified water as needed. In this embodiment, the storage box 130 is the liquid working fluid source, which can provide a liquid working fluid source for the filling step.

[0112] See Figure 8 The specific configuration of the internal piping 580 corresponds to the structure of the freezer. The second circulation power component is a water pump, which is configured according to the structure of the internal piping 580. However, based on the structure of this embodiment, it can be seen that the internal piping 580 has at least two pipes. One pipe is connected to the first end of the replenishment pipe 550 and the storage box 130 at both ends, respectively, so that the liquid working medium in the storage box 130 can be injected into the interlayer 203 through the second end of the replenishment pipe 550. The other pipe is connected to the first end of the drain pipe 560 and the outside at both ends, so that the drain pipe 560 can be connected to the outside.

[0113] The compressor 300 and condenser (not shown in the figure) in the refrigeration cycle system are located in the compressor chamber of the cabinet. The outlet end of the compressor 300 is connected to the inlet end of the condenser via a pipe (connecting pipe). When the freezer is running in refrigeration mode, the compressor 300 is on. The refrigerant is compressed into a high-temperature, high-pressure superheated gas in the compressor cylinder and then discharged into the condenser through the connecting pipe. The high-temperature, high-pressure refrigerant gas dissipates heat through the condenser, and its temperature continuously decreases until it is gradually cooled into room-temperature, high-pressure saturated vapor. In other words, the condenser dissipates heat to the surrounding area when the freezer is running in refrigeration mode and shortly after it stops.

[0114] In this embodiment, the internal pipe 580 passes around the periphery of the condenser in the compressor chamber, so that the pure water flowing out of the storage box 130 absorbs heat and rises in temperature when passing through the compressor chamber, and then flows into the replenishment pipe 550.

[0115] In this embodiment, the main control unit is configured as follows:

[0116] When the first temperature is not higher than the dew point temperature, the electric control valve 570 is switched to the state of closed internal circulation pipeline and open drain pipe 560, and the first circulation power component 520 and / or the second circulation power component are started, so that the liquid working fluid with rising temperature flowing through the internal pipeline 580 is injected into the interlayer 203 of the cabinet door through the replenishment pipe 550, and forms a bottom-up circulation through the external circulation pipeline;

[0117] When the first temperature is 2°C higher than the dew point temperature, the electric control valve 570 is switched to the state of internal circulation pipeline passage and drain pipe 560 is closed, and the second circulation power component is stopped. The subsequent internal circulation pipeline passage can operate according to the preset mode of Example 1.

[0118] Based on the principle of cold air sinking, the bottom of the cabinet door is a heavily condensed area. Therefore, by comparing the first temperature of the bottom of the cabinet door with the dew point temperature corresponding to the current ambient temperature and humidity using a sensor, condensation is likely to occur on the cabinet door when the first temperature is not higher than the dew point temperature. At this time, switching the external circulation pipeline and injecting a slightly warmer liquid working fluid into the cabinet door interlayer can increase the temperature of the outer surface of the cabinet door, reduce the temperature difference between the outer surface of the cabinet door and the environment, and reduce condensation on the cabinet door.

[0119] The liquid working fluid circulation system proposed in this embodiment, through appropriate arrangement of the internal pipes 580, switches to the external circulation pipes via an electric valve when the temperature at the bottom of the door is lower than the current dew point temperature, injecting liquid working fluid that utilizes the condensation heat of the freezer to raise the temperature of the interlayer of the door, thereby increasing the temperature of the outer surface of the door and improving the condensation situation of the door.

[0120] Example 4

[0121] See Figure 9The difference between this embodiment and embodiment 3 is that embodiment 3 uses condensation heat to raise the temperature of the liquid working fluid, while this embodiment uses a heating component to raise the temperature of the liquid working fluid in order to improve the anti-condensation situation of the cabinet door.

[0122] The liquid working fluid circulation system of this embodiment includes an internal circulation pipeline 510, a first circulation power component 520, a temperature and humidity sensor 530, a temperature sensor 540, and a heating component 590.

[0123] The internal circulation pipe 510 is installed on the inner surface of the outer glass plate 230 at the position corresponding to the silkscreen area 202, so that the internal circulation pipe 510 cannot be seen from the front of the cabinet door, which helps to improve the aesthetics of the cabinet door.

[0124] The inlet end of the internal circulation pipe 510 is connected to the upper part of the interlayer 203 near the top, and the outlet end of the internal circulation pipe 510 is connected to the lower part of the interlayer 203 near the bottom. The inlet end and the outlet end of the internal circulation pipe 510 are located on both sides of the interlayer 203, respectively.

[0125] The first circulation power unit 520 is connected to the inner circulation pipeline 510 and is used to drive the circulation flow of the liquid working fluid. The first circulation power unit 520 is electrically connected to the main control unit and is controlled by the main control unit to start and stop.

[0126] The temperature and humidity sensor 530 is located on the top of the cabinet (outer shell 110). The temperature and humidity sensor 530 is electrically connected to the main control unit and is used to detect the ambient humidity and ambient temperature.

[0127] Temperature sensor 540 is located at the bottom of the cabinet door (outer glass panel 230). Temperature sensor 540 is electrically connected to the main control unit and is used to detect the first temperature at the bottom of the cabinet door.

[0128] The heating component 590 is located at the lower part of the interlayer 203, approximately 30 cm from the bottom, and is used to heat the liquid working fluid, causing the heated liquid working fluid to flow upwards. In this embodiment, the heating component is a tubular heating tube.

[0129] See Figure 11 In this embodiment, the main control unit is configured as follows:

[0130] The current dew point temperature is obtained by measuring the ambient humidity and ambient temperature. When the first temperature is not higher than the dew point temperature, the heating component 590 is started and the first circulation power component 520 is started, so that the liquid working fluid in the interlayer forms a bottom-up circulation through the internal circulation pipeline.

[0131] When the first temperature is 2°C higher than the dew point temperature, the heating element 590 is controlled to stop operating.

[0132] Because the liquid working fluid fills the entire glass door interlayer and the interlayer has a certain thickness (generally 5mm), and the liquid working fluid has good circulation capability, in order to simplify the system, reduce the heating power of the heating structure, improve the heat utilization efficiency of the heating structure, and reduce the material cost of the heating structure, this embodiment arranges a tubular heater near the bottom of the cabinet door interlayer. The heat from the heater is efficiently transferred to the liquid working fluid. After heating the liquid working fluid at the bottom, the liquid working fluid flows from bottom to top, and the circulation of the liquid working fluid indirectly increases the outer surface temperature of the glass cabinet door, thereby improving the condensation situation on the cabinet door.

[0133] The method of heating the liquid working fluid through the heating component 590 in this embodiment is also applicable to the liquid working fluid circulation system in Embodiment 3, which has both internal and external circulation pipelines.

[0134] In summary, the freezer proposed in this invention has at least the following beneficial effects compared with the prior art:

[0135] First, this application has a simple structure and can control the operation of the liquid working fluid circulation system during compressor shutdown, causing the liquid working fluid in the cabinet door interlayer to circulate from bottom to top, thus forming a flowing "liquid curtain." This effectively reduces the impact of external radiant heat on the temperature of the cabinet compartment, slows down the rate of temperature rise in the cabinet compartment, and thus reduces temperature fluctuations in the cabinet compartment. Simultaneously, because the flowing "liquid curtain" balances the temperature difference between the top and bottom of the cabinet door, it effectively reduces the temperature difference between the top and bottom of the cabinet compartment, improving the storage environment within the cabinet compartment.

[0136] Secondly, this application allows for the simple and convenient operation of filling the liquid working medium through an external circulation pipeline.

[0137] Third, in one aspect of this application, by appropriately arranging the internal piping, when the temperature at the bottom of the door is lower than the current dew point temperature, an electric valve is used to switch to the external circulation piping to inject a liquid working fluid that utilizes the condensation heat of the freezer to raise the temperature of the interlayer of the door, thereby increasing the temperature of the outer surface of the door and improving the condensation situation on the door.

[0138] Fourth, in another embodiment of this application, a tubular heater is arranged near the bottom of the cabinet door interlayer. The heat from the heater is efficiently transferred to the liquid working fluid. After heating the liquid working fluid at the bottom, it flows upwards, indirectly increasing the outer surface temperature of the glass cabinet door through circulation, thereby improving condensation on the door. This embodiment simplifies the system, reduces the heating power of the heating structure, improves the heat utilization efficiency of the heating structure, and reduces the material cost of the heating structure.

[0139] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A freezer, characterized in that, include: The cabinet contains a defined cooling chamber. A refrigeration cycle system, which is installed inside the cabinet, has an on-time mode and an off-time mode; When the refrigeration cycle system is in the start-up mode, it refrigerates the refrigeration chamber. The cabinet door is movably connected to the cabinet body and is used to open and close the refrigeration chamber. The cabinet door includes a door frame, an inner glass panel, and an outer glass panel. The middle part of the inner glass panel and the outer glass panel is a visible area, and the outer periphery is a screen-printed area for assembly with the door frame. A sandwich is formed between the inner glass panel and the outer glass panel, and the sandwich is filled with a liquid working fluid. An internal circulation pipe is installed on the inner surface of the outer glass plate at a position corresponding to the screen-printed area; the inlet end of the internal circulation pipe is connected to the upper part of the interlayer, and the outlet end of the internal circulation pipe is connected to the lower part of the interlayer. The first circulating power component is connected to the internal circulation pipeline and is used to drive the flow of liquid working fluid; The main control unit, which is electrically connected to the refrigeration cycle system and the first cycle power component, is configured as follows: When the refrigeration cycle system is in shutdown mode, the first circulation power component is started, so that the liquid working fluid in the interlayer forms a bottom-up circulation through the internal circulation pipeline.

2. The freezer according to claim 1, characterized in that, Also includes: Internal piping, which is installed inside the cabinet; A liquid replenishment tube is installed on the inner surface of the outer glass plate at a position corresponding to the screen-printed area. The first end of the liquid replenishment tube passes through the door frame and connects to the pipes inside the cabinet. The second end of the liquid replenishment tube is connected to the lower part of the interlayer and is used to fill the interlayer with liquid working fluid. A drain pipe is installed on the inner surface of the outer glass plate at a position corresponding to the screen-printed area. The first end of the drain pipe passes through the door frame and connects to the pipes inside the cabinet. The second circulating power component is connected to the external circulation pipeline consisting of the internal pipeline, the replenishment pipeline and the drain pipeline, and is used to drive the flow of the liquid working fluid. An electric valve is connected to the second end of the internal circulation pipeline and the drain pipe. The electric valve is used to control the opening and closing of the internal circulation pipeline and the drain pipe.

3. The freezer according to claim 2, characterized in that: The main control unit is electrically connected to the electric valve and the second circulating power component, and the main control unit is configured as follows: Before the interlayer is filled with liquid working fluid, the electric valve is controlled to switch to the state where the internal circulation pipeline is closed and the drain pipe is open. The second circulation power unit is then started, so that the liquid working fluid is injected into the interlayer from the replenishment pipe until liquid working fluid is discharged from the drain pipe. After that, the second circulation power unit is stopped, and the electric valve is controlled to switch to the state where the internal circulation pipeline is open and the drain pipe is closed.

4. The freezer according to claim 2, characterized in that, Also includes: The first sensor is used to detect the current ambient humidity and ambient temperature; The second sensor is used to detect the first temperature at the bottom of the cabinet door; The refrigeration cycle system includes a compressor, a condenser, and connecting pipes that connect the outlet end of the compressor and the inlet end of the condenser, respectively. The internal piping passes around the condenser, causing the temperature of the liquid working fluid flowing through the internal piping to rise before flowing into the replenishment pipe.

5. The freezer according to claim 4, characterized in that: The main control unit is electrically connected to the first sensor and the second sensor, and the main control unit is configured to: The current dew point temperature is obtained by measuring the ambient humidity and ambient temperature. When the first temperature is not higher than the dew point temperature, the electric valve is controlled to switch to the state where the internal circulation pipeline is closed and the drain pipe is open. The second circulation power component is then started, so that the liquid working fluid with rising temperature flowing through the pipeline inside the cabinet is injected into the jacket through the replenishment pipe and forms a bottom-up circulation through the external circulation pipeline.

6. The freezer according to claim 1, characterized in that, Also includes: The first sensor is used to detect ambient humidity and ambient temperature; The second sensor is used to detect the first temperature at the bottom of the cabinet door; A heating component, located in the lower part of the interlayer, is used to heat the liquid working fluid.

7. The freezer according to claim 6, characterized in that: The main control unit is electrically connected to the first sensor, the second sensor, and the heating assembly. The main control unit is configured to: The current dew point temperature is obtained by measuring the ambient humidity and ambient temperature. When the first temperature is not higher than the dew point temperature, the heating component is controlled to operate, and the first circulation power component is controlled to start, so that the liquid working fluid in the jacket forms a bottom-up circulation through the internal circulation pipeline.

8. The freezer according to claim 7, characterized in that: The main control unit is configured as follows: When the first temperature is 2°C higher than the dew point temperature, the heating component is controlled to stop operating.

9. The freezer according to claim 4 or 6, characterized in that: The first sensor is a temperature and humidity sensor, which is installed on the top of the cabinet; The second sensor is a temperature sensor, which is located at the bottom of the cabinet door.

10. The freezer according to claim 2, characterized in that: The door frame is provided with a hinge hole, and the first end of the liquid replenishment pipe and the first end of the liquid drain pipe both pass through the hinge hole to exit the door frame.

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