CN116972572A - Refrigerating equipment and control method thereof - Google Patents

Abstract

The invention provides a refrigeration device and a control method thereof. Wherein, the box body is internally limited with a storage chamber, and the door body is used for blocking the storage chamber. The refrigerating system comprises a compressor, a condenser, a throttling and depressurization component and an evaporator which are connected end to end in sequence, and the evaporator is used for providing cold energy for the storage room. The anti-condensation system comprises a circulating pump, a heat exchange device and an anti-condensation pipe which are connected in series, wherein the heat exchange device comprises a heat exchange container which is thermally connected with the refrigerating system and a turbulent flow valve which is arranged on the heat exchange container, the turbulent flow valve is configured to be changed into a strong turbulent flow state when the flow velocity of the secondary refrigerant reaches a preset threshold value, and the turbulent flow valve is also configured to be changed into a weak turbulent flow state when the flow velocity of the secondary refrigerant does not reach the preset threshold value. The anti-condensation system can heat the anti-condensation pipe with different heating efficiencies, so that the anti-condensation pipe is suitable for different temperature and humidity environments.

Description

Refrigerating equipment and control method thereof

Technical Field

The invention belongs to the technical field of refrigeration, and particularly provides refrigeration equipment and a control method thereof.

Background

Existing refrigerators generally have a refrigerating compartment and a freezing compartment. The temperature of the refrigerating chamber and the freezing chamber is lower than the environment temperature of the refrigerator, and the working temperature of the refrigerating chamber is lower than 4 ℃ and the working temperature of the freezing chamber is lower than-16 ℃ in normal condition.

During the use of the refrigerator, the door seals of the refrigerator are cooled by the low-temperature refrigerating compartment and the freezing compartment, so that the temperature of the refrigerator door seals is lower than the ambient temperature. When the temperature at the door seal of the refrigerator is lower than the dew point temperature of the current environment, condensation can appear at the door seal of the refrigerator. In order to avoid condensation, the existing refrigerators are generally provided with a dew-proof pipe so as to heat the door seal of the refrigerator to be above the dew point temperature through the dew-proof pipe.

Because the dew-proof pipe on the existing refrigerator is usually connected in series between the outlet of the compressor and the inlet of the condenser, the refrigerant can flow through the dew-proof pipe only in the working process of the compressor, and the door seal of the refrigerator can be heated. Therefore, the existing refrigerator is still easy to be condensed when the compressor stops rotating. In addition, the temperature of the dew-proof pipe is higher due to higher temperature of the refrigerant flowing out of the compressor, so that the temperature of the door seal of the refrigerator is always far higher than the dew-point temperature, the temperature difference between the refrigerating chamber and the freezing chamber is larger, and the cold leakage of the refrigerator at the door seal is larger.

Disclosure of Invention

The invention aims to solve the problem that the existing refrigerator cannot heat the dew-proof pipe when the compressor is stopped.

Another object of the present invention is to provide a refrigeration apparatus and a control method thereof, which prevent the refrigeration apparatus from being exposed at a door seal by heating an exposure preventing pipe thereof by an independent exposure preventing system.

The invention further aims to enable the anti-condensation system to heat the anti-condensation pipe with different heating efficiencies through the circulating pump with variable rotating speed and the turbulent flow valve with strong turbulent flow state and weak turbulent flow state, so that the anti-condensation pipe is suitable for different temperature and humidity environments.

To achieve the above object, the present invention provides, in a first aspect, a refrigeration apparatus comprising:

a case defining a storage chamber therein;

a door body for blocking the storage chamber;

the refrigerating system is filled with refrigerant and comprises a compressor, a condenser, a throttling and depressurization component and an evaporator which are connected end to end in sequence, wherein the evaporator is used for providing cold energy for the storage chamber;

the condensation preventing system filled with the secondary refrigerant comprises a circulating pump, a heat exchange device and a condensation preventing pipe which are connected in series, wherein the heat exchange device comprises a heat exchange container which is thermally connected with the refrigerating system and a turbulence valve which is arranged on the heat exchange container, the turbulence valve is configured to be changed into a strong turbulence state when the flow velocity of the secondary refrigerant reaches a preset threshold value, and the turbulence valve is further configured to be changed into a weak turbulence state when the flow velocity of the secondary refrigerant does not reach the preset threshold value.

Optionally, a liquid outlet is formed in the upper part of the heat exchange container; the turbulent flow valve comprises:

the valve body is provided with a liquid inlet at the top, a first valve port is arranged in the middle of the valve body, and a second valve port is arranged at the bottom of the valve body;

a valve spool slidably disposed within the valve body, the valve spool being capable of selectively closing the first valve port and the second valve port;

and a spring arranged between the valve body and the valve core, wherein the spring is used for recovering and keeping the valve core at a position of opening the first valve port and closing the second valve port.

Optionally, the first valve port is located below the liquid outlet, and the liquid level of the secondary refrigerant in the heat exchange container is higher than the liquid outlet.

Optionally, the valve core includes:

a first piston provided with at least one orifice for selectively opening or closing the first valve port, and positioned above the first valve port when the first valve port is opened;

a second piston for selectively opening or blocking the second valve port;

and a connecting rod for fixedly connecting the first piston and the second piston together.

Optionally, the second valve port is formed at the bottom end of the valve body, and the second piston is located outside the valve body.

Optionally, a conduit between the outlet of the compressor and the inlet of the condenser is thermally connected to the heat exchange vessel.

Optionally, the pipeline is wound or coiled on the outer side of the heat exchange container.

The present invention in a second aspect provides a control method of a refrigeration apparatus, the refrigeration apparatus being any one of the first aspects, the control method comprising:

determining the current environment temperature and the current environment humidity of the environment where the refrigeration equipment is located;

determining the rotating speed of the circulating pump according to the current environment temperature and the current environment humidity;

and controlling the circulating pump to rotate according to the determined rotating speed.

Optionally, the determining the rotation speed of the circulating pump according to the current ambient temperature and the current ambient humidity includes:

determining the positions of the current environment temperature and the current environment humidity in a temperature, humidity and rotation speed mapping table;

and determining the rotating speed of the circulating pump according to the determined position.

Optionally, the control method further includes:

in response to detecting that the door body opens/closes the door within a first preset time for a first preset number of times, reducing the minimum value of each humidity interval in the temperature, humidity and rotating speed mapping table by a preset value;

and responding to the detection that the door body is opened/closed for a second preset time within a second preset time, and recovering the temperature, humidity and rotating speed mapping table to the original data.

Based on the foregoing description, it can be understood by those skilled in the art that in the foregoing technical solutions of the present invention, by configuring a separate anti-condensation system for a refrigeration apparatus, and thermally connecting a heat exchange container of the anti-condensation system with the refrigeration system, the anti-condensation system can absorb heat in the refrigeration system through the heat exchange container, so that a high-temperature secondary refrigerant in the heat exchange container flows to the anti-condensation pipe under the action of a circulation pump, and heats the anti-condensation pipe. Further, the turbulent flow valve arranged on the heat exchange container is configured to be changed into a strong turbulent flow state when the flow speed of the secondary refrigerant reaches a preset threshold value, and is changed into a weak turbulent flow state when the flow speed of the secondary refrigerant does not reach the preset threshold value, so that the turbulent flow valve is in the strong turbulent flow state when the rotating speed of the circulating pump is higher, the low-temperature secondary refrigerant entering the heat exchange container is quickly mixed with the high-temperature secondary refrigerant, and the dew prevention pipe is quickly heated. Meanwhile, the turbulence valve is in a weak turbulence state when the rotating speed of the circulating pump is low, so that the low-temperature secondary refrigerant entering the heat exchange container is only mixed with part of the high-temperature secondary refrigerant, and the secondary refrigerant flowing out of the heat exchange container is lower than the secondary refrigerant in a strong turbulence state, and the dew prevention pipe is slowly heated. Therefore, the anti-condensation system can heat the anti-condensation pipe with different heating efficiencies, so that the anti-condensation pipe is suitable for different temperature and humidity environments.

Further, by slidably disposing the spool of the spoiler valve within the body of the spoiler valve and enabling the spool to selectively close the first port and the second port, disposing the spring between the body and the spool, the spool is restored and maintained in a position that opens the first port and closes the second port; the first valve port is positioned below the liquid outlet, so that the liquid level of the secondary refrigerant in the heat exchange container is higher than the liquid outlet; at least one throttling hole is arranged on the first piston, so that the secondary refrigerant flows to the first valve port from the at least one throttling hole when the rotating speed of the circulating pump is low, and the weak turbulence function of the turbulence valve is realized; when the rotation speed of the circulating pump is high, the pressure of the spring can be overcome, the valve core moves downwards to a position where the first piston blocks the first valve port, the second piston opens the second valve port, and the secondary refrigerant flows from the at least one orifice to the second valve port, so that the strong turbulence function of the turbulence valve is realized.

Further, when the refrigeration equipment detects that the door body is opened/closed for the first preset times within the first preset time, the minimum value of each humidity interval in the temperature and humidity-rotating speed mapping table is reduced by a preset value, so that a user can automatically adjust the refrigeration equipment through operating the door body when the condensation prevention effect of the refrigeration equipment is poor, the circulating pump can also operate when the environmental humidity is small, and the problem that the condensation occurs when the environmental humidity is small at the door seal of the refrigeration equipment is solved.

The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. It will be understood by those skilled in the art that components or portions thereof identified in different drawings by the same reference numerals are identical or similar; the drawings of the invention are not necessarily to scale relative to each other.

In the accompanying drawings:

fig. 1 is an effect schematic view of a refrigerating apparatus provided according to the technical concept of the present invention;

fig. 2 is a schematic view showing the constitution of a refrigeration system and an anti-condensation system according to a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a heat exchange device in a first embodiment of the invention;

FIG. 4 is a cross-sectional view of the spoiler valve in a weak spoiler condition according to the first embodiment of the invention;

FIG. 5 is a cross-sectional view of the turbulent valve in a strongly turbulent state according to the first embodiment of the present invention;

fig. 6 is a flowchart showing main steps of a control method of a refrigeration apparatus according to a second embodiment of the present invention;

FIG. 7 is a flowchart showing steps for determining the rotational speed of the circulation pump according to a second embodiment of the present invention;

FIG. 8 is a temperature/humidity-rotation speed map according to a second embodiment of the present invention;

fig. 9 is a partial step flowchart of a control method of a refrigeration apparatus according to a third embodiment of the present invention.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention, and the some embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments provided by the present invention, shall still fall within the scope of protection of the present invention.

It should be noted that, in the description of the present invention, terms such as "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships, which are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Further, it should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

In addition, it should be noted that, in the description of the present invention, the terms "cooling capacity" and "heating capacity" are two descriptions of the same physical state. That is, the higher the "cooling capacity" of a certain object (for example, evaporator, air, condenser, etc.), the lower the "heat" of the object, and the lower the "cooling capacity" of the object, the higher the "heat" of the object. Some object absorbs the cold and releases the heat, and the object releases the cold and absorbs the heat. A target maintains "cold" or "heat" to maintain the target at a current temperature. "refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, i.e., a target (e.g., an evaporator) absorbs heat while it is refrigerating.

As shown in fig. 1, in the present invention, a refrigerating apparatus includes a cabinet 100 and a door 200 mounted on the cabinet 100, and a storage compartment 110 is defined on the cabinet 100.

Alternatively, the refrigeration device is a refrigerator, freezer or freezer.

When the refrigeration appliance is a refrigerator, the storage compartment 110 includes at least one of a refrigerating compartment, a freezing compartment, and a temperature changing compartment. Preferably, the storage compartment 110 includes a refrigerating compartment and a freezing compartment.

When the refrigeration appliance is a freezer, the storage compartment 110 includes a freezer compartment.

When the refrigeration appliance is a refrigerated cabinet, the storage compartment 110 includes a refrigerated compartment.

The refrigerating apparatus of the present invention will be further described with reference to fig. 2 to 5. Fig. 2 is a schematic diagram of a refrigeration system and an anti-condensation system according to a first embodiment of the present invention, fig. 3 is a cross-sectional view of a heat exchange device according to the first embodiment of the present invention, fig. 4 is a cross-sectional view of a turbulent flow valve according to the first embodiment of the present invention in a weak turbulent flow state, and fig. 5 is a cross-sectional view of the turbulent flow valve according to the first embodiment of the present invention in a strong turbulent flow state.

As shown in fig. 2, in the first embodiment of the present invention, the refrigeration apparatus further includes a refrigeration system 300 filled with a refrigerant and an anti-condensation system 400 filled with a coolant, and the anti-condensation system 400 is thermally connected with the refrigeration system 300 such that the anti-condensation system 400 absorbs heat of the refrigeration system 300.

The refrigerant is a conventional refrigerant in the refrigeration system 300 of the refrigerator or the air conditioner, and will not be described herein. The coolant is a liquid, preferably the coolant has a freezing point below-5 ℃. In the first embodiment of the invention, the coolant can be any feasible liquid such as sodium chloride solution, aqueous glycol, and the like.

With continued reference to fig. 2, in a first embodiment of the invention, a refrigeration system 300 includes a compressor 310, a condenser 320, a throttle and pressure reducing member 330, and an evaporator 340 for providing refrigeration to the storage 110, in that order, end-to-end. That is, the outlet of the compressor 310 is fluidly connected to the inlet of the condenser 320, the outlet of the condenser 320 is fluidly connected to the inlet of the throttle reducing member 330, the outlet of the throttle reducing member 330 is fluidly connected to the inlet of the evaporator 340, and the outlet of the evaporator 340 is fluidly connected to the inlet of the compressor 310.

The throttle reducing member 330 may be a capillary tube or an expansion valve.

With continued reference to fig. 2, the refrigeration system 300 further includes a filter 350 and an evaporator tube 360. The filter 350 is connected in series between the outlet of the condenser 320 and the inlet of the throttle reducing member 330. An evaporation tube 360 is connected in series between the outlet of the compressor 310 and the inlet of the condenser 320, and the refrigeration system 300 is thermally connected to the anti-condensation system 400 through the evaporation tube 360.

As shown in fig. 2, in a first embodiment of the present invention, the anti-condensation system 400 includes a circulation pump 410, a heat exchange device 420, and an anti-condensation pipe 430 connected end to end. That is, the outlet of the circulation pump 410 is fluidly connected to the inlet (liquid inlet) of the heat exchanging device 420, the outlet (liquid outlet) of the heat exchanging device 420 is fluidly connected to the inlet of the dew preventing pipe 430, and the outlet of the dew preventing pipe 430 is fluidly connected to the inlet of the circulation pump 410.

The circulation pump 410 may be any feasible pump such as a submersible pump, peristaltic pump, vane pump, etc.

In the anti-condensation system 400, the serial connection sequence of the circulation pump 410, the heat exchange device 420 and the anti-condensation pipe 430 is not limited to the one shown in fig. 2, and one skilled in the art may connect the circulation pump 410, the heat exchange device 420 and the anti-condensation pipe 430 in series in other sequences as required. For example, the heat exchanging device 420 is connected in series between the outlet of the anti-dew tube 430 and the inlet of the circulation pump 410.

As shown in fig. 2, the anti-condensation system 400 is thermally coupled to the evaporation tube 360 through the heat exchanging device 420.

The heat exchanging device 420 will be described in detail with reference to fig. 3 to 5.

As shown in fig. 3, the heat exchange device 420 includes a heat exchange container 421 thermally coupled to the refrigeration system 300 and a turbulent valve 422 mounted on the heat exchange container 421, the turbulent valve 422 being shifted to a weak turbulent state (as shown in fig. 4) when the flow rate of the coolant does not reach a preset threshold, and to a strong turbulent state (as shown in fig. 4) when the flow rate of the coolant reaches the preset threshold.

The preset threshold may be any feasible value. In a first embodiment of the invention, the predetermined threshold is the flow rate at which the coolant circulation pump 410 in the anti-condensation system 400 reaches a predetermined rotational speed. The preset rotational speed may be any feasible rotational speed, such as 20%, 30%, 45%, 50%, 75% of the maximum rotational speed of the circulation pump 410, etc. Preferably, the preset rotational speed is 50% of the maximum rotational speed of the circulation pump 410.

In the first embodiment of the present invention, the evaporation tube 360 is wound or coiled around the outside of the heat exchange container 421 so that the heat exchange container 421 absorbs heat of the evaporation tube 360.

In addition, one skilled in the art can also thermally couple other piping between the outlet of the compressor 310 and the inlet of the condenser 320 (e.g., the discharge line of the compressor 310) to the heat exchange vessel 421 as desired. Alternatively, the heat exchange container 421 is fixedly coupled to the condenser 320.

With continued reference to FIG. 3, the heat exchange vessel 421 has a liquid outlet 4211 disposed in an upper portion thereof, and the level of the coolant in the heat exchange vessel 421 is above the liquid outlet 4211.

As shown in fig. 4 and 5, the spoiler valve 422 includes a valve body 4221, a spool 4222, and a spring 4223. The top of valve body 4221 is provided with inlet 42211, and the middle part of valve body 4221 is provided with first valve port 42212, and the bottom of valve body 4221 is provided with second valve port 42213. Wherein the first valve port 42212 is slightly lower than the liquid outlet 4211. In addition, one skilled in the art can also make the height of the first valve port 42212 slightly higher than the liquid outlet 4211 as desired. Further, a second valve port 42213 is formed at the bottom end of the valve body 4221. Still further, a stopper structure (not shown) for stopping the valve body 4222 and an abutting structure (not shown) for abutting against the spring 4223 are provided in the valve body 4221. The stop structure and abutment structure may be any viable structure, such as a ring structure.

With continued reference to fig. 4 and 5, the valve spool 4222 is slidably disposed within the valve body 4221, and the valve spool 4222 is capable of selectively closing the first valve port 42212 and the second valve port 42213, i.e., when the valve spool 4222 opens one of the first valve port 42212 and the second valve port 42213, the other of the first valve port 42212 and the second valve port 42213 is closed. Specifically, the spool 4222 includes a first piston 42221, a second piston 42222, and a connecting rod 42223. Wherein, the first piston 42221 is provided with at least one orifice 422211, the first piston 42221 is configured to selectively open or block the first valve port 42212, and the first piston 42221 is located above the first valve port 42212 when the first valve port 42212 is opened. The second piston 42222 is located outside the valve body 4221, and is used to selectively open or block the second valve port 42213. The connecting rod 42223 is used to fixedly connect the first piston 42221 and the second piston 42222 together. Specifically, the top end of the connecting rod 42223 is fixedly connected to the first piston 42221, and the bottom end of the connecting rod 42223 is fixedly connected to the second piston 42222. Further, the link 42223 is provided with a shoulder (not shown) abutting against the spring 4223, and the shoulder may have an annular structure or a plurality of convex structures distributed at equal intervals in the circumferential direction of the link 42223.

With continued reference to fig. 4 and 5, a spring 4223 is disposed between the valve body 4221 and the valve spool 4222, the spring 4223 being configured to restore and retain the valve spool 4222 in a position to open the first port 42212 and close the second port 42213. Specifically, the top end of the spring 4223 abuts against a shoulder on the valve body 4222, and the bottom end of the spring 4223 abuts against an abutment structure in the valve body 4221.

The operation of the turbulence valve 422 in the first embodiment of the present invention will be described in detail with reference to fig. 3 to 5.

As shown in fig. 3 and 4, when the flow rate of the coolant is small and the preset threshold is not reached, the pressure difference applied to the first piston 42221 is small and the pressure applied to the first piston 42221 is smaller than the elastic force of the spring 4223 when the coolant flows through the orifice 422211, the first valve port 42212 is opened and the second valve port 42213 is closed. At this time, the coolant flows into the valve body 4221 from the inlet 42211 at the top end of the valve body 4221, then flows out through the orifice 422211 and the first valve port 42212, and flows toward the outlet 4211 of the heat exchange container 421 as indicated by the solid arrows in fig. 3.

As shown in fig. 3 and 5, when the flow rate of the coolant is large and reaches the preset threshold, the pressure difference applied to the first piston 42221 is large when the coolant flows through the orifice 422211, and the pressure applied to the first piston 42221 is larger than the elastic force of the spring 4223, so that the valve element 4222 is driven to move down to a position where the first piston 42221 blocks the first valve port 42212 and the second piston 42222 opens the second valve port 42213. At this time, the shoulder on the valve body 4222 abuts against the stopper structure on the valve body 4221, and the coolant flows into the valve body 4221 from the inlet 42211 at the top end of the valve body 4221, then flows out through the orifice 422211 and the second valve port 42213, and flows to the outlet 4211 of the heat exchange container 421 as indicated by the dashed arrow in fig. 3.

As can be seen from fig. 3, when the coolant flows from the first valve port 42212 to the liquid outlet 4211, the low-temperature coolant has less stirring force on the high-temperature coolant in the heat exchange container 421, and only the high-temperature coolant at the top of the heat exchange container 421 is mixed with the low-temperature coolant, so that the temperature of the coolant flowing out of the liquid outlet 4211 is lower. When the coolant flows from the second valve port 42213 to the liquid outlet 4211, the low-temperature coolant has a high stirring force on the high-temperature coolant in the heat exchange container 421, and almost all the high-temperature coolant in the heat exchange container 421 is mixed with the low-temperature coolant, so that the temperature of the coolant flowing out of the liquid outlet 4211 is high. This phenomenon is particularly remarkable when the circulation pump 410 is just started.

In the first embodiment of the present invention, in order to ensure that the coolant in the heat exchange container 421 can store more heat, and in order to ensure that the coolant in the heat exchange container 421 can quickly obtain a higher temperature when the circulation pump 410 is stopped, the volume of the heat exchange container 421 is 1.5-3 times that of the dew-preventing pipe 430.

The control method of the refrigerating apparatus in the present invention will be described in detail. It should be noted that the control method described later is applicable to the refrigeration apparatus described in any of the foregoing embodiments.

As shown in fig. 6, in a second embodiment of the present invention, a control method of a refrigeration apparatus includes:

step S110, determining a current ambient temperature and a current ambient humidity of an environment in which the refrigeration device is located.

Specifically, the refrigeration apparatus includes an ambient temperature detecting device (not shown in the drawing) and an ambient humidity detecting device (not shown in the drawing) provided on the case 100 or the door 200, so that the refrigeration apparatus detects a current ambient temperature of an environment in which the refrigeration apparatus is located through the ambient temperature detecting device, and detects a current ambient humidity of the environment in which the refrigeration apparatus is located through the ambient humidity detecting device.

In addition, the person skilled in the art can set the ambient temperature detecting device and the ambient humidity detecting device as a whole as required, in other words, the refrigerating device detects the current ambient temperature of the environment where the refrigerating device is located and the current ambient humidity of the environment where the refrigerating device is located through the same detecting device.

Step S120, determining the rotating speed of the circulating pump according to the current environment temperature and the current environment humidity.

As shown in fig. 7, after determining the current ambient temperature and the current ambient humidity, step S120 further includes:

step S121, determining the positions of the current ambient temperature and the current ambient humidity in the temperature-humidity-rotation speed mapping table (as shown in fig. 8).

In the temperature-humidity-rotation speed map shown in fig. 8, the rotation speed list of the circulation pump 410 indicates that the current rotation speed is a percentage of the maximum rotation speed of the circulation pump 410.

As an example one, if the current ambient temperature is 15 ℃ and the current ambient humidity is 52%, the current ambient temperature and the current ambient humidity are at the position of line 2 in the temperature-humidity-rotation speed map (shown in fig. 8). The rotation speed of the circulation pump 410 corresponding thereto is 50% of the maximum rotation speed, and is stopped for 5 minutes every 15 minutes of operation.

As an example two, if the current ambient temperature is 23 ℃ and the current ambient humidity is 70%, the current ambient temperature and the current ambient humidity are at the 8 th row of the temperature-humidity-rotation-speed mapping table (shown in fig. 8). The rotation speed of the circulation pump 410 corresponding thereto is 60% of the maximum rotation speed, and is stopped for 5 minutes every 25 minutes.

As an example three, if the current ambient temperature is 35 ℃ and the current ambient humidity is 40%, the current ambient temperature and the current ambient humidity are at the 16 th row of the temperature-humidity-rotation-speed mapping table (shown in fig. 8). The rotation speed of the circulation pump 410 is 0.

Step S122, determining the rotation speed of the circulation pump 410 according to the determined position.

Specifically, after determining the positions of the current ambient temperature and the current ambient humidity in the temperature-humidity-rotation speed map (shown in fig. 8), that is, determining the rows of the current ambient temperature and the current ambient humidity in the temperature-humidity-rotation speed map (shown in fig. 8), the rotation speed of the circulation pump 410 may be found from the determined corresponding rows.

From step S130, the circulation pump 410 is controlled to rotate at the determined rotation speed.

Based on the foregoing, it will be appreciated by those skilled in the art that in the second embodiment of the present invention, the dew-preventing tubes 430 are rapidly heated by configuring the turbulence valves 422 mounted on the heat exchange containers 421 to switch to the strong turbulence state when the flow rate of the coolant reaches the preset threshold and to switch to the weak turbulence state when the flow rate of the coolant does not reach the preset threshold, such that the turbulence valves 422 are in the strong turbulence state when the rotational speed of the circulation pump 410 is high, so that the low-temperature coolant entering the heat exchange containers 421 is rapidly mixed with the high-temperature coolant. Meanwhile, the turbulence valve 422 is in a weak turbulence state when the rotation speed of the circulating pump 410 is low, so that the low-temperature coolant entering the heat exchange container 421 is only mixed with part of the high-temperature coolant, and the temperature of the coolant flowing out of the heat exchange container 421 is lower than that of the coolant in a strong turbulence state, thereby slowly heating the dew prevention pipe 430. Therefore, the anti-condensation system 400 of the present invention can heat the anti-condensation pipe 430 with different heating efficiencies, so that the anti-condensation pipe 430 is adapted to different temperature and humidity environments.

A control method of the refrigerating apparatus in the third embodiment of the present invention will be described in detail with reference to fig. 9.

As shown in fig. 9, in comparison with the second embodiment of the present invention, in the third embodiment of the present invention, the control method of the refrigeration apparatus further includes:

in step S210, in response to detecting that the door body 200 is opened/closed for a first preset number of times within a first preset time, the minimum value of each humidity interval in the temperature-humidity-rotation speed mapping table is reduced by a preset value.

The preset value may be any feasible value, for example, 5%, 7%, 10%, 15%, etc.

Illustratively, the refrigeration appliance is provided with a microswitch configured to be triggered when the door 200 is opened. The first preset time is 45S, the first preset times are three times, and the preset value can be 5%. When the user opens and closes the door body 200 three times in succession within 45S, the micro switch is triggered three times in succession. At this time, if it is determined in step S121 that the current ambient temperature and the current ambient humidity are at the 12 th row position in the temperature-humidity-rotation-speed map (as shown in fig. 8), 45% -65% of the 12 th row is adjusted to 40% -65%.

In step S220, in response to detecting that the door body 200 is opened/closed for a second preset number of times within a second preset time, the temperature, humidity and rotation speed mapping table is restored to the original value.

Illustratively, the refrigeration appliance is provided with a microswitch configured to be triggered when the door 200 is opened. The second preset time is 45S, and the second preset times are four times. When the user opens and closes the door body 200 four times in succession within 45S, the micro switch is activated four times in succession. At this time, if it is determined in step S121 that the current ambient temperature and the current ambient humidity are at the 12 th row position in the temperature-humidity-rotation-speed map (as shown in fig. 8), the current ambient humidity in the 12 th row is restored to 45% -65%.

Based on the foregoing description, it can be understood by those skilled in the art that in the third embodiment of the present invention, by enabling the minimum value of each humidity interval in the temperature, humidity and operation policy mapping table to be reduced by a preset value when the refrigeration device detects that the door body 200 is opened/closed for the first preset time for the first preset times, the user can automatically adjust the refrigeration device by operating the door body 200 when the anti-condensation effect of the refrigeration device is not good, so that the circulation pump 410 can also operate when the environmental humidity is small, thereby overcoming the problem that the condensation occurs when the environmental humidity is small at the door seal of the refrigeration device.

Although not shown in the drawings, in the fourth embodiment of the present invention, the control method of the refrigeration apparatus further includes, before step S110, compared with the foregoing second or third embodiment: it is determined whether the temperature of the storage chamber 110 is within the operating temperature range.

Preferably, in the fourth embodiment of the present invention, the storage compartment 110 includes a refrigerating compartment and a freezing compartment. The working temperature range of the refrigerating chamber is less than or equal to 4 ℃, and the working temperature range of the freezing chamber is less than or equal to-16 ℃. When it is detected that the operating temperature range of the refrigerating compartment is less than or equal to 4 ℃ and/or the operating temperature range of the freezing compartment is less than or equal to-16 ℃, step S110 is performed again.

Although not shown in the drawings, in the fifth embodiment of the present invention, the control method of the refrigeration apparatus further includes, as compared with any of the foregoing second to fourth embodiments: during the operation of the circulation pump 410, the circulation pump 410 is controlled to stop rotating in response to the door 200 being opened. To prevent the temperature of the dew prevention pipe 430 from being high, thereby increasing the amount of cold leakage of the storage chamber 110.

Although not shown, in the sixth embodiment of the present invention, in comparison with any of the previous second to fourth embodiments, during the operation of the circulation pump 410, in response to the door 200 being opened, the circulation pump 410 is controlled to reversely rotate for a third preset time or a preset number of revolutions, so that the high-temperature coolant in the coolant-preventing pipe 430 flows out of the coolant-preventing pipe 430, and the low-temperature coolant between the outlet of the coolant-preventing pipe 430 and the inlet of the heat exchanging device 420 flows back into the coolant-preventing pipe 430. To prevent the temperature of the dew prevention pipe 430 from being high, thereby increasing the amount of cold leakage of the storage chamber 110.

In the sixth embodiment of the present invention, the third preset time may be any feasible time, such as 10S, 15S, and 20S, on the premise of ensuring that the coolant with high temperature in the dew-tube 430 flows out of the dew-tube 430, and the coolant with low temperature between the outlet of the dew-tube 430 and the inlet of the heat exchanging device 420 flows back into the dew-tube 430. The third preset time may be obtained by a plurality of experiments. Likewise, the preset number of revolutions may be any feasible number of revolutions, such as 50 revolutions, 75 revolutions, 86 revolutions. The preset rotational speed is equal to or greater than the volume of the anti-dew tube 430 +..

Preferably, the preset rotational speed = volume of the anti-dew tube 430 +.5 displacement of the circulation pump 410.

Thus far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it will be readily understood by those skilled in the art that the scope of the present invention is not limited to only these specific embodiments. The technical solutions in the above embodiments can be split and combined by those skilled in the art without departing from the technical principles of the present invention, and equivalent changes or substitutions can be made to related technical features, so any changes, equivalent substitutions, improvements, etc. made within the technical principles and/or technical concepts of the present invention will fall within the protection scope of the present invention.

Claims (10)

1. A refrigeration appliance comprising:

a case defining a storage chamber therein;

a door body for blocking the storage chamber;

the refrigerating system is filled with refrigerant and comprises a compressor, a condenser, a throttling and depressurization component and an evaporator which are connected end to end in sequence, wherein the evaporator is used for providing cold energy for the storage chamber;

the condensation preventing system filled with the secondary refrigerant comprises a circulating pump, a heat exchange device and a condensation preventing pipe which are connected in series, wherein the heat exchange device comprises a heat exchange container which is thermally connected with the refrigerating system and a turbulence valve which is arranged on the heat exchange container, the turbulence valve is configured to be changed into a strong turbulence state when the flow velocity of the secondary refrigerant reaches a preset threshold value, and the turbulence valve is further configured to be changed into a weak turbulence state when the flow velocity of the secondary refrigerant does not reach the preset threshold value.

2. The refrigeration appliance of claim 1 wherein,

a liquid outlet is formed in the upper part of the heat exchange container;

the turbulent flow valve comprises:

the valve body is provided with a liquid inlet at the top, a first valve port is arranged in the middle of the valve body, and a second valve port is arranged at the bottom of the valve body;

a valve spool slidably disposed within the valve body, the valve spool being capable of selectively closing the first valve port and the second valve port;

and a spring arranged between the valve body and the valve core, wherein the spring is used for recovering and keeping the valve core at a position of opening the first valve port and closing the second valve port.

3. The refrigeration appliance of claim 2 wherein,

the first valve port is positioned below the liquid outlet, and the liquid level of the secondary refrigerant in the heat exchange container is higher than the liquid outlet.

4. A refrigeration appliance according to claim 3, wherein,

the valve core includes:

a first piston provided with at least one orifice for selectively opening or closing the first valve port, and positioned above the first valve port when the first valve port is opened;

a second piston for selectively opening or blocking the second valve port;

and a connecting rod for fixedly connecting the first piston and the second piston together.

5. The refrigeration appliance of claim 4 wherein,

the second valve port is formed at the bottom end of the valve body, and the second piston is positioned at the outer side of the valve body.

6. The refrigeration appliance according to any of claims 1 to 5, wherein,

and a pipeline between the outlet of the compressor and the inlet of the condenser is thermally connected with the heat exchange container.

7. The refrigeration appliance of claim 6 wherein,

the pipeline is wound or coiled on the outer side of the heat exchange container.

8. A control method of a refrigeration apparatus, the refrigeration apparatus being the refrigeration apparatus according to any one of claims 1 to 7, the control method comprising:

determining the current environment temperature and the current environment humidity of the environment where the refrigeration equipment is located;

determining the rotating speed of the circulating pump according to the current environment temperature and the current environment humidity;

and controlling the circulating pump to rotate according to the determined rotating speed.

9. The control method according to claim 8, wherein,

the determining the rotation speed of the circulating pump according to the current environment temperature and the current environment humidity comprises the following steps:

determining the positions of the current environment temperature and the current environment humidity in a temperature, humidity and rotation speed mapping table;

and determining the rotating speed of the circulating pump according to the determined position.

10. The control method according to claim 9, wherein,

the control method further includes:

in response to detecting that the door body opens/closes the door within a first preset time for a first preset number of times, reducing the minimum value of each humidity interval in the temperature, humidity and rotating speed mapping table by a preset value;

and responding to the detection that the door body is opened/closed for a second preset time within a second preset time, and recovering the temperature, humidity and rotating speed mapping table to the original data.