Refrigeration equipment and control method thereof

Abstract

The invention relates to refrigeration equipment and a control method thereof. The refrigeration equipment comprises a humidity sensor, a condensing device and a humidifying device, and the humidifying device comprises a first-stage water pan, a wet film evaporator, a humidifying fan and a second-stage water pan. According to the refrigeration equipment and the control method thereof, the humidity in the cabinet body of the refrigeration equipment is adjusted through the humidifying device by means of the condensate water generated by the condensing device, the equipment can be humidified without an external water source, and the humidity in the refrigeration equipment can be adjusted under the condition that no water source exists or the refrigeration equipment is applied to mobile equipment; moreover, by the adoption of the wet film evaporator, air phase humidifying can be achieved, the humidity in the cabinet body of the refrigeration equipment is kept at the specified humidity, in addition, condensate water from the wet film evaporator is collected through the second-stage water pan, the condensate water is returned to the first-stage water pan, and the humidity in the cabinet body of the refrigeration equipment is kept at the specified humidity. Condensate water which is not evaporated by the wet film evaporator can be recycled.

Description

Technical Field

[0001] The present application relates to a refrigeration device and a control method thereof. Background Art

[0002] In existing refrigeration equipment, for example, in order to keep fruits and vegetables fresh, it is desirable to install a device with a humidity adjustment function such as a humidifier in the refrigeration equipment so as to maintain an appropriate humidity inside the refrigeration equipment. To this end, it is necessary to regularly add water to the humidifier of the refrigeration equipment, or, if the refrigeration equipment is a mobile device that can be transported by a vehicle, it is sometimes necessary to equip it with a water storage device such as a water tank. Therefore, there is a problem that it is difficult to achieve the humidity adjustment function in a place without a water source. Summary of the invention

[0003] This application is made in view of the technical problems existing in the above-mentioned prior art. One purpose of this application is to provide a refrigeration device and a control method thereof.

[0004] According to one solution of the present application, a refrigeration device is provided, the refrigeration device comprising a cabinet, a condensing device, a humidifying device, a humidity sensor and a controller, the condensing device, the humidifying device and the humidity sensor being arranged in the cabinet, characterized in that the cabinet comprises a fresh air inlet and an exhaust port, the condensing device can condense the moisture in the air in the cabinet to produce condensed water, the humidifying device comprises: a primary water receiving tray, the primary water receiving tray is used to collect the condensed water produced by the condensing device; a wet film evaporator, the wet film evaporator can collect the condensed water from the The condensed water in the primary water receiving tray evaporates to form water vapor; a humidifying fan, which can disperse the water vapor generated by the wet film evaporator into the cabinet; and a secondary water receiving tray, which can collect condensed water from the humidifying mechanism and return the collected condensed water to the primary water receiving tray, or discharge the collected condensed water out of the cabinet. The control device controls the condensing device and the humidifying device based on the detection result of the humidity sensor so as to switch the refrigeration equipment between humidification mode and dehumidification mode.

[0005] According to the above-mentioned refrigeration equipment of the present application, the humidifying device may also include a water separator for spraying condensed water onto the wet film evaporator, the water separator is connected to the primary water receiving tray via a condensed water supply pipe, and a flow regulating valve is arranged in the condensed water supply pipe.

[0006] According to the above-mentioned refrigeration equipment of the present application, the control device may also be configured to switch the refrigeration equipment to a humidification mode when the humidity sensor detects that the humidity in the cabinet is lower than a specified value. In the humidification mode, the condensed water generated by the condensing device is collected in the primary water receiving tray, the flow regulating valve is opened, and the condensed water is supplied from the primary water receiving tray to the wet film evaporator, and the water vapor generated by the wet film evaporator is dispersed into the cabinet by using the humidification fan.

[0007] According to the above-mentioned refrigeration equipment of the present application, the control device may also be configured to switch the refrigeration equipment to a dehumidification mode when the humidity sensor detects that the humidity in the cabinet is higher than a specified value. In the dehumidification mode, the flow regulating valve is closed to cut off the supply of condensed water from the primary water receiving pan to the wet film evaporator, and the humidification fan is placed in a non-working state.

[0008] According to the above-mentioned refrigeration equipment of the present application, a liquid level sensor may be provided in the first-level water receiving tray. When the liquid level detected by the liquid level sensor is lower than a specified value, the controller opens the fresh air inlet and the condensation device so as to utilize the condensation device to generate condensed water and supply it to the first-level water receiving tray.

[0009] According to the above-mentioned refrigeration equipment of the present application, the first-level water receiving pan may be provided with a first-level overflow pipe, and the first-level overflow pipe is configured to allow the condensed water above the upper limit value to overflow into the second-level water receiving pan when the liquid level of the condensed water in the first-level water receiving pan is higher than the upper limit value.

[0010] According to the above-mentioned refrigeration equipment of the present application, the secondary water receiving pan may be provided with a drain pipe, and a drain valve may be provided in the drain pipe. In the dehumidification mode, the condensed water in the secondary water receiving pan may be discharged out of the cabinet body through the drain pipe by opening the drain valve.

[0011] According to the above-mentioned refrigeration equipment of the present application, the secondary water receiving tray may also be provided with a secondary overflow pipe, and the secondary overflow pipe is configured to allow the condensed water above the upper limit value to overflow outside the cabinet when the liquid level of the condensed water in the secondary water receiving tray is higher than the upper limit value.

[0012] According to the above-mentioned refrigeration equipment of the present application, a three-stage water receiving tray is arranged in the external space of the cabinet separated from the internal space of the cabinet, and a heater is arranged in the three-stage water receiving tray. The water discharged from the secondary water receiving tray through the drain pipe and / or the secondary overflow pipe to the three-stage water receiving tray is heated and evaporated by the heater.

[0013] According to another embodiment of the present application, a control method for a refrigeration device is provided, wherein the refrigeration device comprises a cabinet, a condensing device, a humidifying device and a humidity sensor, wherein the condensing device, the humidifying device and the humidity sensor are arranged in the cabinet, and the cabinet comprises a fresh air inlet and an exhaust port, and the condensing device can condense the moisture in the air in the cabinet to produce condensed water, and the humidifying device comprises: a primary water receiving tray, wherein the primary water receiving tray is used to collect the condensed water produced by the condensing device; a wet film evaporator, wherein the wet film evaporator can evaporate the condensed water from the primary water receiving tray to form water vapor; a humidifying fan, wherein the humidifying fan can disperse the water vapor produced by the wet film evaporator into the cabinet; and a secondary water receiving tray, wherein the secondary water receiving tray can collect the condensed water from the humidifying mechanism and can The collected condensed water is returned to the primary water receiving tray, or the collected condensed water is discharged out of the cabinet, characterized in that the control method comprises: when the humidity sensor detects that the humidity in the cabinet is lower than a specified value, the condensed water generated by the condensing device is collected in the primary water receiving tray, the flow regulating valve is opened, and the condensed water is supplied from the primary water receiving tray to the wet film evaporator, and the humidifying fan is used to disperse the water vapor generated by the wet film evaporator into the cabinet, thereby switching the refrigeration equipment to the humidification mode; when the humidity sensor detects that the humidity in the cabinet is higher than a specified value, the flow regulating valve is closed to cut off the supply of condensed water from the primary water receiving tray to the wet film evaporator, and the humidifying fan is put into a non-working state, thereby switching the refrigeration equipment to the dehumidification mode.

[0014] According to the control method of the above-mentioned refrigeration equipment of the present application, the humidifying device may also include a water separator for spraying condensed water onto the wet film evaporator, the water separator is connected to the primary water receiving pan via a condensed water supply pipe, and a flow regulating valve is arranged in the condensed water supply pipe.

[0015] According to the control method of the above-mentioned refrigeration equipment of the present application, the control method may also include: when it is detected that the liquid level in the first-level water receiving pan is lower than a specified value, opening the fresh air inlet and the condensing device so as to utilize the condensing device to generate condensed water, and supply it to the first-level water receiving pan.

[0016] According to the control method of the refrigeration equipment mentioned above in the present application, the control method may also include: when the liquid level of the condensed water in the primary water receiving tray is higher than an upper limit value, causing the condensed water above the upper limit value to overflow into the secondary water receiving tray.

[0017] According to the control method of the above-mentioned refrigeration equipment of the present application, the secondary water receiving pan may be provided with a drain pipe, and a drain valve may be provided in the drain pipe. The control method further includes: in the dehumidification mode, by opening the drain valve, the condensed water in the secondary water receiving pan is discharged outside the cabinet through the drain pipe.

[0018] According to the control method of the above-mentioned refrigeration equipment of the present application, the secondary water receiving tray may also be provided with a secondary overflow pipe, and the control method may further include: when the liquid level of the condensed water in the secondary water receiving tray is higher than an upper limit value, causing the part of the condensed water higher than the upper limit value to overflow outside the cabinet.

[0019] According to the control method of the above-mentioned refrigeration equipment of the present application, a three-stage water receiving tray may be arranged in the external space of the cabinet separated from the internal space of the cabinet, and a heater may be arranged in the three-stage water receiving tray. The control method further includes: discharging the water in the secondary water receiving tray from the secondary water receiving tray to the tertiary water receiving tray via the drain pipe and / or the secondary overflow pipe, and heating and evaporating the water in the tertiary water receiving tray by using the heater.

[0020] Effects of the Invention

[0021] According to the refrigeration equipment of the present application, the humidity in the cabinet of the refrigeration equipment is adjusted by using the condensed water generated by the condensing device through the humidifying device. The equipment can be humidified without an external water source. The humidity inside the refrigeration equipment can be adjusted when there is no water source or when it is applied to a mobile device. Moreover, by adopting a wet film evaporator, gas phase humidification can be achieved. In addition, by using a secondary water receiving tray to collect the condensed water from the wet film evaporator and returning the condensed water to the primary water receiving tray, the condensed water that has not been evaporated by the wet film evaporator can be recycled and reused.

[0022] In addition, by setting up a water separator, condensed water can be evenly supplied to the wet film evaporator to improve the evaporation efficiency of the wet film evaporator. Moreover, by setting up a flow regulating valve, it is possible to control whether condensed water is supplied to the wet film evaporator and the amount of condensed water supplied to the wet film evaporator, thereby achieving flexible control of humidity.

[0023] Furthermore, by switching the refrigerating device to the humidifying mode when the humidity is lower than a predetermined value, the humidity in the refrigerating device can be adjusted or maintained at the predetermined humidity.

[0024] Furthermore, by switching the refrigerating device to the dehumidification mode when the humidity is higher than a predetermined value, the humidity in the refrigerating device can be adjusted or maintained at the predetermined humidity.

[0025] In addition, by controlling the opening of the fresh air inlet and the condensing device according to the liquid level detected by the liquid level sensor, a sufficient amount of condensed water can be maintained in the primary water receiving tray to ensure the condensed water supply to the wet film humidifier.

[0026] In addition, by setting up a first-level overflow pipe, when the condensed water collected in the first-level water receiving tray is more than the amount of water consumed by the humidification device for humidification, the excess water is discharged to the second-level water receiving tray through the first-level overflow pipe, thereby preventing excessive condensed water in the first-level water receiving tray from overflowing into the cabinet.

[0027] In addition, the secondary water receiving tray is provided with a drain pipe and a drain valve. In the dehumidification mode, a large amount of condensed water collected in the secondary water receiving tray is discharged outside the cabinet, which can prevent the condensed water in the secondary water receiving tray from overflowing into the cabinet.

[0028] In addition, by setting up a secondary overflow pipe, when too much condensed water is collected in the secondary water receiving tray, the excess water is discharged out of the cabinet through the secondary overflow pipe, thereby preventing the condensed water in the secondary water receiving tray from overflowing into the cabinet.

[0029] In addition, by arranging a tertiary water receiving tray and a heater in the cabinet outer space separated from the cabinet inner space and heating and evaporating the water discharged from the cabinet, it is possible to avoid directly discharging the water discharged from the secondary overflow pipe into the environment.

[0030] According to the control method of the refrigeration equipment of the present application, the humidity in the cabinet of the refrigeration equipment is adjusted by using the condensed water generated by the condensing device through the humidifying device. The equipment can be humidified without an external water source. The humidity inside the refrigeration equipment can be adjusted when there is no water source or when it is applied to a mobile device. Moreover, by adopting a wet film evaporator, gas phase humidification can be achieved so that the humidity in the cabinet of the refrigeration equipment is maintained at a specified humidity. In addition, by using a secondary water receiving tray to collect the condensed water from the wet film evaporator and returning the condensed water to the primary water receiving tray, the condensed water that has not been evaporated by the wet film evaporator can be recycled and reused.

[0031] In addition, by setting up a water separator, condensed water can be evenly supplied to the wet film evaporator to improve the evaporation efficiency of the wet film evaporator. Moreover, by setting up a flow regulating valve, it is possible to control whether condensed water is supplied to the wet film evaporator and the amount of condensed water supplied to the wet film evaporator, thereby achieving flexible control of humidity.

[0032] In addition, by controlling the opening of the fresh air inlet and the condensing device according to the liquid level detected by the liquid level sensor, a sufficient amount of condensed water can be maintained in the primary water receiving tray to ensure the condensed water supply to the wet film humidifier.

[0033] In addition, when the condensed water collected in the primary water receiving tray is more than the amount of water consumed by the humidifier for humidification, the excess water is discharged to the secondary water receiving tray, thereby preventing the excessive condensed water in the primary water receiving tray from overflowing into the cabinet.

[0034] In addition, the secondary water receiving tray is provided with a drain pipe and a drain valve. In the dehumidification mode, a large amount of condensed water collected in the secondary water receiving tray is discharged outside the cabinet, which can prevent the condensed water in the secondary water receiving tray from overflowing into the cabinet.

[0035] In addition, by setting up a secondary overflow pipe, when too much condensed water is collected in the secondary water receiving tray, the excess water is discharged out of the cabinet through the secondary overflow pipe, thereby preventing the condensed water in the secondary water receiving tray from overflowing into the cabinet.

[0036] In addition, by arranging a tertiary water receiving tray and a heater in the cabinet outer space separated from the cabinet inner space and heating and evaporating the water discharged from the cabinet, it is possible to avoid directly discharging the water discharged from the secondary overflow pipe into the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic principle diagram for illustrating the refrigeration equipment of the present application.

[0038] Figure 2 This is a flowchart for explaining the control method of the refrigeration equipment of the present application.

[0039] Figure 3 This is a flowchart for explaining the drainage process of the refrigeration equipment of the present application. Description of reference numerals:

[0040] 1 Exhaust port

[0041] 1a Exhaust valve

[0042] 2 Condensing unit

[0043] 3 Fresh air inlet

[0044] 3a Intake valve

[0045] 4. First-level water tray

[0046] 4a Condensate supply pipe

[0047] 5 Filters

[0048] 6 Flow control valve

[0049] 7 Water distributor

[0050] 8 Wet film evaporator

[0051] 9 Pumps

[0052] 10 Drain valve

[0053] 11. Heater

[0054] 12 Three-level water tray

[0055] 13 Secondary overflow pipe

[0056] 14 Secondary water tray

[0057] 14a Return pipe

[0058] 15 Humidification fan

[0059] 16 Primary overflow pipe

[0060] 17 Liquid level sensor

[0061] 18 Humidity Sensor

[0062] 19 Cabinet

[0063] 20 Drain pipe

[0064] 21 Cabinet external space

[0065] 100 Refrigeration equipment DETAILED DESCRIPTION

[0066] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects, unless explicitly stated not to be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0067] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0068] Furthermore, when a component is referred to as being “on” another component, the component may be directly on the other component, or may be indirectly on the other component with one or more intermediate components interposed therebetween. Additionally, when a component is referred to as being “connected to” another component, the component may be directly connected to the other component, or may be indirectly connected to the other component with one or more intermediate components interposed therebetween. Hereinafter, the same reference numerals denote the same components.

[0069] The descriptions of directions or positional relationships indicated by “upper”, “lower”, “top”, “bottom”, “front”, “back”, “inside” and “outside” in the present disclosure are only for the convenience of describing the present disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present application.

[0070] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0071] Figure 1 Schematic diagram of the refrigeration equipment used to illustrate the present application. Figure 1 As shown, the refrigeration device 100 of the present application has a cabinet 19. The cabinet 19 is provided with a fresh air inlet 3 and an exhaust port 1. An air inlet valve 3a is provided at the fresh air inlet 3, and an exhaust valve 1a is provided at the exhaust port 1. The refrigeration device 100 can introduce fresh air into the cabinet 19 through the fresh air inlet 3 by opening the air inlet valve 3a, and can prevent the introduction of fresh air into the cabinet 19 through the fresh air inlet 3 by closing the air inlet valve 3a. Similarly, by opening the exhaust valve 1a, the gas in the cabinet 19 is allowed to be discharged to the outside. By closing the exhaust valve 1a, the gas in the cabinet 19 is prevented from being discharged to the outside.

[0072] A condensing device 2 is provided in the cabinet 19. As an example of the condensing device 2, for example, a refrigeration device such as an air cooler or a surface cooler can be used. The condensing device 2 performs heat exchange with the fresh air sent into the cabinet 19 from the fresh air inlet 3, on the one hand, plays a role in cooling the cabinet 19, and on the other hand, condenses the water vapor contained in the fresh air to generate condensed water.

[0073] A primary water receiving pan 4 is provided in the cabinet 19 below the condensing device 2. Condensed water generated by the condensing device 2 through heat exchange with fresh air falls into the primary water receiving pan 4 by gravity and is collected by the primary water receiving pan 4.

[0074] A wet film evaporator 8 and a humidifying fan 15 are also provided in the cabinet 19. The condensed water collected from the condensing device 2 in the primary water receiving tray 4 is supplied to the wet film evaporator 8. Figure 1As shown, for example, a condensate supply pipe 4a for supplying condensate to the wet film evaporator 8 is provided on the first-level water receiving tray 4. In addition, preferably, a water separator 7 is connected to the condensate supply pipe 4a. Thus, the condensate collected in the first-level water receiving tray 4 is transported to the water separator 7 via the condensate supply pipe 4a, and then, is evenly sprayed from the water separator 7 onto the wet film evaporator 8. The water sprayed onto the wet film evaporator 8 flows downward along the wet film. During this process, on the surface of the wet film, the water exchanges heat and moisture with the air. After absorbing heat, the water vaporizes and evaporates to form water vapor. At the same time, the humidifying fan 15 is turned on, and the humidifying fan 15 is used to accelerate the convection on the surface of the wet film evaporator 8, promote the evaporation of water in the wet film evaporator 8, and make the formed water vapor evenly dispersed into the cabinet 19. In addition, as Figure 1 As shown, preferably, a flow control valve 6 composed of, for example, a solenoid valve can be provided in the condensed water supply pipe 4a. By providing the flow control valve 6, whether condensed water is supplied from the primary water receiving pan 4 to the wet film evaporator 8 and the flow rate of the condensed water to be supplied can be controlled. Figure 1 As shown, preferably, a filter 5 is further provided in the condensed water supply pipe 4a. By providing the filter 5 in the condensed water supply pipe 4a, the water supplied from the primary water receiving tray 4 to the wet film evaporator 8 can be filtered, thereby preventing the wet film evaporator 8 from being contaminated by impurities contained in the water, which results in a decrease in evaporation efficiency, and improving the service life of the wet film evaporator 8.

[0075] A secondary water receiving tray 14 is provided in the cabinet 19 below the wet film evaporator 8. Water that is not evaporated and flows downward in the wet film evaporator 8 is collected in the secondary water receiving tray 14.

[0076] Between the primary water receiving tray 4 and the secondary water receiving tray 14, a water return device is provided for returning the water collected in the secondary water receiving tray 14 to the primary water receiving tray 4. Figure 1 As shown, the water return device may include a water return pipe 14a and a pump 9. By turning on the pump 9, the water in the secondary water receiving pan 14 can be pumped back to the primary water receiving pan 4 via the water return pipe 14a. By providing the secondary water receiving pan 14, the water return pipe 14a and the pump 9, the water that is not evaporated in the wet film evaporator 8 can be recycled and reused.

[0077] The primary water receiving tray 4, wet film evaporator 8, humidifying fan 15 and secondary water receiving tray 14 described above can also be regarded as a humidifying device of the present application as a whole.

[0078] In addition, a liquid level sensor 17 may be provided in the primary water receiving tray 4. Thus, the opening and closing of the fresh air inlet 3, the condensing device 2, the flow regulating valve 6, and the humidifying fan 15 may be controlled according to the liquid level in the primary water receiving tray 4 detected by the liquid level sensor 17.

[0079] Furthermore, if Figure 1 As shown, a primary overflow pipe 16 may be provided in the primary water receiving pan 4. The inlet of the primary overflow pipe 16 is provided at a position at a specified height from the bottom surface of the primary water receiving pan 4. Thus, when the liquid level of the condensed water collected in the primary water receiving pan 4 reaches or exceeds the specified height, the condensed water may flow from the inlet of the primary overflow pipe 16 into the primary overflow pipe 16, and flow along the primary overflow pipe 16 to the secondary water receiving pan 14. Thus, in the case where the speed at which the primary water receiving pan 4 collects condensed water is greater than the speed at which the condensed water is consumed by the evaporation of the wet film evaporator 8, the condensed water in the primary water receiving pan 4 that exceeds the specified height will be discharged to the secondary water receiving pan 14 via the primary overflow pipe 16, thereby preventing the excessive condensed water in the primary water receiving pan 4 from overflowing into the cabinet 19.

[0080] In addition, if Figure 1 As shown, a secondary overflow pipe 13 may be provided in the secondary water receiving pan 14. The inlet of the secondary overflow pipe 13 is provided at a position at a specified height from the bottom surface of the secondary water receiving pan 14. Thus, when the height of the liquid level of the water collected in the secondary water receiving pan 14 reaches or exceeds the specified height, the condensed water may flow into the secondary overflow pipe 13 from the inlet of the secondary overflow pipe 13, and flow out of the cabinet 19 along the secondary overflow pipe 13. Thus, in the case where the speed of collecting water in the secondary water receiving pan 14 is greater than the speed of returning water to the primary water receiving pan 4 by using the pump 9 and the return pipe 14a, the water in the secondary water receiving pan 14 that exceeds the specified height will be discharged to the outside of the cabinet 19 through the secondary overflow pipe 13, thereby preventing the water in the secondary water receiving pan 14 from overflowing into the cabinet 19 due to excessive water.

[0081] In addition, if Figure 1 As shown, in addition to the secondary overflow pipe 13, the secondary water receiving pan 14 may also be provided with a drain pipe 20 for draining the water in the secondary water receiving pan 14. The inlet of the drain pipe 20 is provided at the bottom of the secondary water receiving pan 14, and a drain valve 10 is provided in the drain pipe 20. Thus, by opening the drain valve 10, the water in the secondary water receiving pan 14 can be drained. In the case where the refrigeration device 100 is a mobile device that can be transported by a vehicle or the like, in order to prevent the water in the primary water receiving pan 4 and the secondary water receiving pan 14 from overflowing into the cabinet 19 due to the movement of the vehicle or the like during transportation, the drain valve 10 can be opened and the water in the humidifying device can be drained using the drain pipe 20.

[0082] Furthermore, if Figure 1As shown, a space 21 outside the cabinet separated from the internal space of the cabinet 19 (i.e., for example, it can be an equipment room separated from the cabinet 19, or it can be an open space open to the outside of the refrigeration device 100) can also be provided in the refrigeration device 100, and a three-stage water receiving pan 12 can be provided in the space 21 outside the cabinet. Water from the secondary overflow pipe 13 or the drain pipe 20 is discharged into the three-stage water receiving pan 12. A heater 11 such as an electric heater is provided in the three-stage water receiving pan 12. By heating the water in the three-stage water receiving pan 12 by the heater 11, the water can be evaporated and dissipated into the air. In this way, it is possible to avoid directly discharging the water from the secondary overflow pipe 13 (i.e., the water from the cabinet 19) into the environment and causing an impact on the environment.

[0083] In addition, the refrigeration device 100 of the present application is also provided with a control device (not shown) for controlling the operation of the refrigeration device 100. Examples of the control device include a computer, a programmable logic controller, and the like.

[0084] Below, refer to Figure 2 and Figure 3 The flowchart shown in is used to illustrate the control method of the refrigeration device 100 of the present application.

[0085] First, the control device performs control based on the humidity in the cabinet 19 detected by the humidity sensor 18 provided in the cabinet 19 of the refrigeration device 100. When the humidity detected by the humidity sensor 18 is lower than a predetermined value, the control device controls the refrigeration device 100 in the humidification mode.

[0086] In the humidification mode, the liquid level in the primary water receiving pan 12 is detected by the liquid level sensor 17. When the liquid level sensor 17 detects that the primary water receiving pan 12 is lower than a specified value, the control device opens the air inlet valve 3a and the air outlet valve 1a, and at the same time, turns on the condensing device 2. As a result, fresh air (air) containing water vapor flows into the cabinet 19 of the refrigerating device 100 through the fresh air inlet 3, and the fresh air flowing into the cabinet 19 is cooled by the condensing device 2, so that the water vapor contained in the fresh air condenses to form condensed water, and the air condensed by the condensing device 2 is discharged from the exhaust port 1. As the condensing device 2, for example, a cold air machine as a refrigeration device of the refrigerating device 100 can be directly used. When a cold air machine is used as the condensing device 2, it is preferable to operate the cold air machine at a low temperature and a low wind speed (that is, operate the cold air machine at a target temperature and a wind speed lower than when simply cooling) so as to generate sufficient condensed water as soon as possible. In addition, the example of the condensing device 2 is not limited to an air cooler, and other devices that can generate condensed water, such as a surface cooler, can also be used. The condensed water generated by the condensing device 2 is collected in a primary water receiving pan 4 disposed below the condensing device 2.

[0087] When the liquid level sensor 17 detects that the liquid level in the primary water receiving pan 4 reaches or exceeds the specified value, the control device closes the air inlet valve 3a and the exhaust valve 1a, stops the circulation of fresh air in the cabinet 19, and operates the condensing device 2 such as a cold air machine at the set temperature in the normal cooling mode. In addition, the control device opens the flow regulating valve 6, so that the condensed water collected in the primary water receiving pan 4 flows into the condensed water supply pipe 4a. The condensed water flowing into the condensed water supply pipe 4a flows through the filter 5 to filter the impurities mixed into the condensed water in the primary water receiving pan 4, and then flows to the water separator 7, which is evenly sprayed onto the wet film evaporator 8. Preferably, the control device is configured to control the opening of the flow regulating valve 6 based on the actual value of the humidity detected by the humidity sensor 18 and the preset humidity target value, so as to control the supply amount of condensed water supplied from the primary water receiving pan 4 to the wet film evaporator 8. The condensed water flowing through the surface of the wet film of the wet film evaporator 8 is vaporized and evaporated by exchanging heat and moisture with the air to form water vapor. In addition, the control device also controls the start-up of the humidification fan, and uses the humidification fan to generate convection on the wet film surface of the wet film evaporator 8, accelerate the circulation of air on the wet film surface, so that the condensed water can more fully exchange heat and moisture with the air, and accelerate the evaporation rate of the condensed water. In addition, preferably, the controller can also control the rotation speed of the humidification fan to control the wind speed of the humidification fan, thereby adjusting the evaporation rate of the condensed water in the wet film evaporator 8.

[0088] The condensed water that has flowed through the wet film evaporator 8 but has not been evaporated flows down from the wet film evaporator 8 and is collected in the secondary water receiving pan 14. The control device operates the pump 9 to return the water collected in the secondary water receiving pan 14 to the primary water receiving pan 4 via the return pipe 14a. By arranging the secondary water receiving pan 14 downstream of the wet film evaporator 8 and returning the water in the secondary water receiving pan 14 to the primary water receiving pan 4 via the return pipe 14a using the pump 9, the water that has not been evaporated in the wet film evaporator 8 can be recycled and reused, so that the condensed water generated by the condensing device 2 can be fully utilized, the operation time of the condensing device 2 can be shortened, and the consumed energy can be reduced, that is, the working efficiency of the condensing device 2 can be improved.

[0089] When the control device controls the opening of the flow regulating valve 6 and the speed of the humidifying fan 15 according to the actual humidity in the cabinet 19 and / or the target humidity set by the user, so that the evaporation amount of water in the wet film evaporator 8 is reduced, the amount of condensed water consumed by the wet film evaporator 8 will be significantly less than the amount of condensed water generated by the condensing device 2. In this case, a large amount of water will be quickly collected in the primary water receiving tray 4. In order to avoid the water in the primary water receiving tray 4 from overflowing from the primary water receiving tray 4 and flowing into the cabinet 19 due to the water amount in the primary water receiving tray 4 increasing too quickly, which will have an adverse effect on the materials such as fruits and vegetables stored in the cabinet 19, it is necessary to discharge the water that increases too quickly from the primary water receiving tray 4 in a timely manner. According to the refrigeration device 100 of the present application, as described above, the primary overflow pipe 16 is connected to the primary water receiving pan 4. When the liquid level in the primary water receiving pan 4 reaches or exceeds the height where the primary overflow pipe 16 is connected to the inlet of the primary water receiving pan 4, the water in the primary water receiving pan 4 that exceeds the height flows out of the primary water receiving pan 4 through the primary overflow pipe 16 and flows into the secondary water receiving pan 14. Thus, it is possible to avoid excessive water in the primary water receiving pan 4 from overflowing into the cabinet 19 and affecting fruits and vegetables. Furthermore, similarly, the secondary water receiving pan 14 is connected to the secondary overflow pipe 13. When the water collected in the secondary water receiving tray 14 from the primary water receiving tray 4 (including water that has passed through the wet film evaporator 8 but has not been evaporated and / or water that has overflowed from the primary overflow pipe 16) is excessive, that is, when the liquid level in the secondary water receiving tray 14 reaches or exceeds the height of the inlet of the secondary overflow pipe 13 connected to the secondary water receiving tray 14, the water in the secondary water receiving tray 14 that exceeds the height flows out of the secondary water receiving tray 14 through the secondary overflow pipe 13 to the outside of the cabinet 19. Thus, it is possible to avoid excessive water in the secondary water receiving tray 14 from overflowing into the cabinet 19 and affecting fruits and vegetables.

[0090] Preferably, as described above, a tertiary water receiving pan 12 is provided in the cabinet external space 21 separated from the internal space of the cabinet 19, and the water flowing out of the secondary overflow pipe 13 flows into the tertiary water receiving pan 12, is heated by a heater (e.g., an electric heater) provided in the tertiary water receiving pan 12, evaporates and dissipates into the air. Thus, it is possible to avoid directly discharging the water from the secondary overflow pipe 13 (i.e., the water from the cabinet 19) into the environment and causing an impact on the environment.

[0091] When the humidity sensor 18 detects that the humidity in the cabinet 19 exceeds a specified value, the control device controls the refrigeration device 100 in a dehumidification mode.

[0092] In the case where a cold air machine is used as the condensing device 2, in the dehumidification mode, the control device operates the cold air machine as the condensing device 2 at a target temperature and wind speed higher than the target temperature and wind speed in the humidification mode. In addition, the control device opens the flow regulating valve 6, and at the same time, turns off the humidification fan 15 and the pump 9. As a result, the condensed water generated by the condensing device 2 collected in the primary water receiving tray 4 flows into the secondary water receiving tray 14 via the wet film evaporator 8. Since the humidification fan 15 is turned off, only a small part of the water flowing through the wet film evaporator 8 is evaporated or almost not evaporated, and directly flows into the secondary water receiving tray 14. Furthermore, the control device opens the drain valve 10, and the water flowing into the secondary water receiving tray 14 is discharged to the outside of the cabinet 19 through the drain pipe 20, for example, it can be discharged to the tertiary water receiving tray 12, and is heated by the heater 11, evaporated and dissipated into the atmosphere.

[0093] In addition, if Figure 3 As shown, the refrigeration device 100 of the present application, when applied to a mobile device such as a vehicle, for example, when the mobile device is in a moving state such as a vehicle is driving, in order to prevent the water in the primary water receiving tray 4 and / or the secondary water receiving tray 14 from shaking and overflowing into the cabinet 19 due to the movement of the device, an operator (for example, a driver) can send a drainage command to the control device by means of a button or a touch screen, and when the control device receives the drainage command, the control device controls the refrigeration device 100 to open the flow regulating valve 6, the drainage valve 10, and the pump 9 to drain the water in the primary water receiving tray 4 and the secondary water receiving tray 14.

[0094] The refrigeration equipment 100 and the control method thereof of the present application can be applied to the field where the items stored in the refrigeration equipment need to be moisturized, and in particular, can be advantageously applied to the fruit and vegetable preservation equipment installed in the mobile device such as the vehicle. In the case where the refrigeration equipment 100 and the control method thereof of the present application are applied to the fruit and vegetable preservation equipment installed in the mobile device such as the vehicle, even if the vehicle is parked in a place without a water source, the condensed water generated by the equipment itself can be used to adjust the humidity inside the refrigeration equipment without a water source. Furthermore, by accurately controlling the humidity inside the equipment as needed while refrigerating the inside of the refrigeration equipment 100, the fruits and vegetables can be effectively preserved, and since the refrigeration equipment 100 and the control method thereof of the present application adopt the wet film gasification humidification cycle technology, the gas phase humidification is realized, and therefore, the accumulation of water droplets on the surface of fruits and vegetables can be avoided, and the surface rot of fruits and vegetables caused by the accumulation of water droplets can be prevented.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A refrigeration device, comprising a cabinet, a condensing device, a humidifying device, a humidity sensor and a controller, wherein the condensing device, the humidifying device and the humidity sensor are arranged in the cabinet, characterized in that: The cabinet includes a fresh air inlet and an exhaust port. The condensing device can condense the moisture in the air in the cabinet to produce condensed water. The humidifying device comprises: A primary water receiving tray, the primary water receiving tray is used to collect condensed water generated by the condensing device; a wet film evaporator, the wet film evaporator being capable of evaporating condensed water from the primary water receiving pan to form water vapor; a humidifying fan capable of dispersing water vapor generated by the wet film evaporator into the cabinet; and A secondary water receiving tray, the secondary water receiving tray can collect condensed water from the humidifying mechanism, and can return the collected condensed water to the primary water receiving tray, or discharge the collected condensed water outside the cabinet, The control device controls the condensing device and the humidifying device based on the detection result of the humidity sensor, so as to switch the refrigerating device between a humidification mode and a dehumidification mode.

2. The refrigeration device according to claim 1, characterized in that: The humidifying device further comprises a water separator for spraying condensed water to the wet film evaporator, wherein the water separator is connected to the primary water receiving tray via a condensed water supply pipe, and a flow regulating valve is arranged in the condensed water supply pipe.

3. The refrigeration equipment according to claim 1 or 2, characterized in that: The control device is configured to switch the refrigeration equipment to a humidification mode when the humidity sensor detects that the humidity in the cabinet is lower than a specified value. In the humidification mode, the condensed water generated by the condensing device is collected in the primary water receiving tray, the flow regulating valve is opened, the condensed water is supplied from the primary water receiving tray to the wet film evaporator, and the water vapor generated by the wet film evaporator is dispersed into the cabinet by using the humidification fan.

4. The refrigeration device according to any one of claims 1 to 3, characterized in that: The control device is configured to switch the refrigeration equipment to a dehumidification mode when the humidity sensor detects that the humidity in the cabinet is higher than a specified value. In the dehumidification mode, the flow regulating valve is closed to cut off the supply of condensed water from the primary water receiving pan to the wet film evaporator, and the humidification fan is placed in a non-working state.

5. The refrigeration device according to any one of claims 1 to 4, characterized in that: A liquid level sensor is provided in the first-level water receiving pan. When the liquid level detected by the liquid level sensor is lower than a specified value, the controller opens the fresh air inlet and the condensing device so as to generate condensed water by the condensing device and supply it to the first-level water receiving pan.

6. The refrigeration device according to any one of claims 1 to 5, characterized in that: The primary water receiving pan is provided with a primary overflow pipe, and the primary overflow pipe is configured to allow the condensed water above the upper limit to overflow into the secondary water receiving pan when the liquid level of the condensed water in the primary water receiving pan is higher than the upper limit.

7. The refrigeration device according to any one of claims 1 to 6, characterized in that: The secondary water receiving pan is provided with a drain pipe, and a drain valve is provided in the drain pipe. In the dehumidification mode, the condensed water in the secondary water receiving pan is discharged out of the cabinet through the drain pipe by opening the drain valve.

8. The refrigeration device according to claim 7, characterized in that The secondary water receiving tray is also provided with a secondary overflow pipe, and the secondary overflow pipe is configured to make the condensed water above the upper limit overflow to the outside of the cabinet when the liquid level of the condensed water in the secondary water receiving tray is higher than the upper limit.

9. The refrigeration device according to claim 8, characterized in that A three-stage water receiving pan is arranged in the outer space of the cabinet separated from the inner space of the cabinet, and a heater is arranged in the three-stage water receiving pan. Water discharged from the second-stage water receiving pan through the drain pipe and / or the second-stage overflow pipe into the three-stage water receiving pan is heated and evaporated by the heater.

10. A control method for a refrigeration device, the refrigeration device comprising a cabinet, a condensing device, a humidifying device and a humidity sensor, the condensing device, the humidifying device and the humidity sensor being arranged in the cabinet, the cabinet comprising a fresh air inlet and an air outlet, the condensing device being capable of condensing moisture in the air in the cabinet to generate condensed water, the humidifying device comprising: A primary water receiving tray, the primary water receiving tray is used to collect condensed water generated by the condensing device; a wet film evaporator, the wet film evaporator being capable of evaporating condensed water from the primary water receiving pan to form water vapor; a humidifying fan being capable of dispersing the water vapor generated by the wet film evaporator into the cabinet; and a secondary water receiving pan, wherein the secondary water receiving pan can collect condensed water from the humidifying mechanism and can return the collected condensed water to the primary water receiving pan, or discharge the collected condensed water outside the cabinet, wherein the control method comprises: When the humidity sensor detects that the humidity in the cabinet is lower than a specified value, the condensed water generated by the condensing device is collected in the primary water receiving tray, the flow regulating valve is opened, the condensed water is supplied from the primary water receiving tray to the wet film evaporator, and the water vapor generated by the wet film evaporator is dispersed into the cabinet by the humidifying fan, thereby switching the refrigeration device to a humidification mode; When the humidity sensor detects that the humidity in the cabinet is higher than a specified value, the flow regulating valve is closed, the supply of condensed water from the primary water receiving tray to the wet film evaporator is cut off, and the humidifying fan is put into a non-working state, thereby switching the refrigeration equipment to a dehumidification mode.

11. The control method for refrigeration equipment according to claim 10, characterized in that: The humidifying device further comprises a water separator for spraying condensed water to the wet film evaporator, wherein the water separator is connected to the primary water receiving tray via a condensed water supply pipe, and a flow regulating valve is arranged in the condensed water supply pipe.

12. The control method for refrigeration equipment according to claim 10 or 11, characterized in that: The control method further includes: when it is detected that the liquid level in the primary water receiving pan is lower than a specified value, opening the fresh air inlet and the condensing device so as to generate condensed water by using the condensing device and supplying the condensed water to the primary water receiving pan.

13. The control method for a refrigeration device according to any one of claims 10 to 12, characterized in that: The control method further includes: when the liquid level of the condensed water in the primary water receiving tray is higher than an upper limit value, causing the portion of the condensed water higher than the upper limit value to overflow into the secondary water receiving tray.

14. The control method for a refrigeration device according to any one of claims 10 to 13, characterized in that: The secondary water receiving pan is provided with a drain pipe, and a drain valve is provided in the drain pipe. The control method further includes: in the dehumidification mode, by opening the drain valve, the condensed water in the secondary water receiving tray is discharged out of the cabinet via a drain pipe.

15. The control method of the refrigeration equipment according to claim 14, characterized in that: The secondary water receiving tray is also provided with a secondary overflow pipe. The control method further includes: when the liquid level of the condensed water in the secondary water receiving tray is higher than an upper limit value, causing the condensed water above the upper limit value to overflow outside the cabinet.

16. The control method of the refrigeration equipment according to claim 15, characterized in that: A three-stage water receiving pan is arranged in the outer space of the cabinet separated from the inner space of the cabinet, and a heater is arranged in the three-stage water receiving pan. The control method further includes: draining the water in the secondary water receiving tray from the secondary water receiving tray to the tertiary water receiving tray via the drain pipe and / or the secondary overflow pipe, and heating and evaporating the water in the tertiary water receiving tray by using the heater.

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