CN106642838B - Cooling device and control method thereof - Google Patents

Abstract

The invention discloses a cooling device, comprising a compressor, a condenser, a throttling device and an evaporator. The outlet of the compressor is communicated with the inlet of the condenser, and the outlet of the condenser is communicated with the inlet of the throttling device. The outlet is communicated with the inlet of the evaporator, and the outlet of the evaporator is communicated with the inlet of the compressor; the cooling device also includes a liquid pipe and a liquid container, the liquid pipe has a heat exchange section relatively fixed with the evaporator, and the liquid outlet of the heat exchange section, The liquid inlets are all communicated with the inner space of the liquid container to form a liquid circulation flow path, and the liquid container is also provided with a cold liquid outlet; the cooling device includes a temperature detection device, which can directly or indirectly detect the liquid container or liquid pipe. Liquid temperature parameters. In the present invention, by setting a liquid container and a liquid circulation flow path, the liquid container can store the low-temperature liquid cooled by the evaporator, and can be used in time when there is a need for use.

Description

A cooling device and its control method

technical field

The invention relates to the field of refrigeration, in particular to a cooling device and a control method thereof.

Background technique

With the change of living habits, the number of consumers who drink lower temperature beverages has gradually increased, especially countries in Europe and the United States have the habit of drinking iced coffee. At present, in the process of making coffee, hot water with a higher temperature is used for brewing, and ice cubes are added to cool down when necessary. The prior art uses more compressor refrigeration devices, such as compressor ice machines, to make ice cubes. Including evaporators, compressors, condensers, throttling elements, etc., the liquid is frozen into the required form by absorbing heat from the refrigerant, and then the ice cubes are taken out from the mold cavity for use. During use, there may be insufficient ice cubes. Too much ice cubes cannot reach the ideal drinking temperature. On the contrary, adding more ice cubes may dilute the drink as the ice cubes melt and affect the taste.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a cooling device that can provide cryogenic liquid in time.

In order to achieve the above object, the present invention adopts the following technical solutions: a cooling device, comprising a compressor, a condenser, a throttling device, and an evaporator, the outlet of the compressor is communicated with the inlet of the condenser, and the condenser The outlet of the throttling device is communicated with the inlet of the throttling device, the outlet of the throttling device is communicated with the inlet of the evaporator, and the outlet of the evaporator is communicated with the inlet of the compressor;

The cooling device further includes a liquid pipe and a liquid container, the liquid pipe has a heat exchange section relatively fixed to the evaporator, and the liquid outlet and the liquid inlet of the heat exchange section are connected to the inner space of the liquid container. The liquid circulation flow path is connected to form a liquid circulation flow path. When the evaporator works, the liquid circulation flow path passes through the evaporator to cool down, and the liquid container is also provided with a cold liquid outlet;

The cooling device includes a temperature detection device, which can directly or indirectly detect the liquid temperature parameter at the liquid container, or the temperature detection device can directly or indirectly detect the liquid temperature parameter at the liquid pipe.

Further, the liquid container is connected with a liquid inlet pipeline, and the liquid inlet pipeline is provided with a liquid pipeline switch, which can control the liquid circulation of the liquid inlet pipeline;

The liquid circulation flow path is provided with a fluid pump, and the fluid pump is located at the connecting pipeline between the liquid container and the heat exchange section of the liquid pipe.

Further, the evaporator includes a heat-conducting base, the heat-conducting base covers the heat exchange section of the refrigerant pipe of the evaporator and the liquid pipe, and the refrigerant pipe of the evaporator is relatively fixed in the heat-conducting base. , the heat exchange section is relatively fixed in the heat conduction base, the heat exchange section and the refrigerant tube of the evaporator are in contact through the heat conduction base, the refrigerant inlet of the evaporator and the refrigerant The outlet extends out of the heat-conducting base, and the liquid inlet and the liquid outlet of the heat exchange section extend out of the heat-conducting base.

Further, the refrigerant tube of the evaporator and the heat exchange section of the liquid tube are respectively coiled in the form of coils to form a plurality of coiled surfaces, where the coiled surface of the refrigerant tube and the coiled surface of the heat exchange section are located. The planes are substantially parallel or coincident with each other, and the flow direction of the refrigerant in the refrigerant tube of the evaporator is opposite to the flow direction of the liquid in the heat exchange section; The planes where the coiled surfaces of the heat exchange section are located intersect with each other, and the flow direction of the refrigerant in the refrigerant tube of the evaporator and the flow direction of the liquid in the heat exchange section are arranged to cross each other.

Further, the planes where the coiled surface of the refrigerant tube of the evaporator and the coiled surface of the heat exchange section are located are substantially parallel or coincident with each other, and the refrigerant inlet, the refrigerant outlet of the refrigerant tube and the heat exchange section are The liquid inlet and outlet are located on the same side of the thermally conductive base.

Further, each coiled surface formed by coiling the refrigerant tube of the evaporator and the heat exchange section is approximately circular or elliptical or zigzag, trapezoidal or spiral.

Further, the coiled surface of the refrigerant tube of the evaporator is roughly parallel to or coincident with the plane of the coiled surface of the heat exchange section, and the equivalent diameter of the coiled surface of the heat exchange section is larger or smaller than the coiled surface of the refrigerant tube. The center position of the coiled surface of the heat exchange section and the center position of the coiled surface of the refrigerant tube are substantially coincident or on the same line, and the distance between the two adjacent coiled surfaces of the refrigerant tube is the same as the center position of the coiled surface of the refrigerant tube. The distance between two adjacent coiled surfaces of the hot segment is approximately the same;

Or the equivalent diameter of the coiled surface of the heat exchange section is approximately equal to the equivalent diameter of the coiled surface of the refrigerant tube, and the center position of the coiled surface of the heat exchange section and the center position of the coiled surface of the refrigerant tube are substantially coincident or located at the same In a straight line, the plurality of coiled surfaces of the refrigerant tube and the plurality of coiled surfaces formed by the heat exchange section are arranged in a staggered interval.

Another object of the present invention is to provide a control method of a cooling device.

In order to achieve the above object, the present invention also adopts the following technical solutions: A control method of a cooling device as described in the above technical solutions, comprising:

By setting the liquid level detection device, the cooling device can directly or indirectly detect the liquid level parameters of the liquid in the liquid container, and judge whether the detected liquid level parameters meet the liquid level setting target, and if so, the liquid container is not filled with liquid. ; if no, fill the liquid container;

The cooling device can directly or indirectly detect the temperature parameters of the liquid at the liquid container or the liquid pipe by setting the temperature detection device, and judge whether the detected temperature parameters meet the temperature setting target, if so, the compressor stops and the liquid circulation flows. circuit stops circulating; if not, the compressor operates and the liquid circulation flow path operates.

Further, the cooling device controls the liquid inlet or the non-liquid inlet of the liquid container by setting a liquid pipeline switch at the liquid inlet pipeline outside the liquid container; further, the cooling device is provided with a central controller and the liquid pipe. The circuit switch is electrically connected to control the opening or closing of the liquid pipeline switch; if the liquid level parameter meets the liquid level set target, the central controller controls the liquid pipeline switch to close, and the liquid container stops liquid feeding at this time; If the liquid level parameter does not meet the liquid level setting target, the central controller controls the liquid level pipeline switch to open, and the liquid level container is filled with liquid.

Further, the cooling device is provided with a fluid pump connected between the liquid container and the liquid pipe to provide power for the operation of the liquid circulation flow path, and the cooling device is electrically connected to the fluid pump by setting a central controller. Control the operation of the fluid pump; if the temperature parameter detected by the temperature detection device does not meet the temperature set target, the central controller provides a control signal to start the fluid pump to make the liquid circulation flow path run; if the temperature parameter meets the temperature set target, Then the central controller sends out a control signal for stopping the fluid pump to stop the circulation of the liquid circulation flow path.

The above technical solution of the present invention forms a liquid circulation flow path by arranging a liquid container and a heat exchange section of a liquid pipe, and the heat exchange section and the evaporator are relatively fixed for heat exchange, and the liquid container can store the low-temperature liquid cooled by the evaporator. , when there is a need for use, it can be used in time.

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of an embodiment of a cooling device, wherein the outline of the outer box is omitted;

FIG. 2 is a schematic side view of the cooling device shown in FIG. 1, wherein the fan is omitted, and the arrows indicate the flow direction of the refrigerant and the flow direction of the liquid;

FIG. 3 is a schematic diagram of an embodiment of the cooling assembly of the cooling device shown in FIG. 1 , wherein the arrows indicate the flow direction of the refrigerant and the flow direction of the liquid;

4 is a schematic cross-sectional view of the cooling assembly shown in FIG. 3 along the I-I plane;

5 is a schematic diagram of another embodiment of the cooling assembly of the cooling device shown in FIG. 1 , wherein the arrows indicate the flow direction of the refrigerant and the flow direction of the liquid, and part of the thermally conductive substrate is omitted;

6 is a schematic diagram of yet another embodiment of the cooling assembly of the cooling device shown in FIG. 1 , wherein the thermally conductive substrate is omitted, and the arrows indicate the flow direction of the refrigerant and the flow direction of the liquid;

7 is a schematic cross-sectional view of the cooling assembly with a thermally conductive base of the cooling device shown in FIG. 6 along the II-II plane;

FIG. 8 is a schematic diagram of part of the control flow of the cooling device shown in FIG. 1 .

Detailed ways

1-2, the cooling device 100 of this embodiment is used to reduce the temperature of the liquid to a set range, so as to prepare a low-temperature drinking liquid or a solid-liquid mixture, for example, to prepare a low-temperature drinking ice water or ice water at a temperature of 0°C to 5°C. Mixtures or other low temperature liquids for industrial purposes. The obtained ice water or ice water mixture can be used to mix coffee, fruit pulp or other raw materials to make ice drinks, and can also be used to cool wine, juice or other liquids to near freezing point The liquid or solid-liquid mixture at the temperature has a good taste when drinking.

The cooling device 100 of the present embodiment includes a box body with an installation cavity, where the evaporator 11 , the compressor 12 , the condenser 13 , the throttling device 14 , the fan 15 , and the liquid container 16 are placed. The outlet of the compressor 12 is communicated with the inlet of the condenser 13, the outlet of the condenser 13 is communicated with the inlet of the throttling device 14, the outlet of the throttling device 14 is communicated with the inlet of the evaporator, and the outlet of the evaporator 11 is communicated with the inlet of the compressor 12 , the connection between the outlet and the inlet listed here is not limited to the direct communication between the two, but also includes the arrangement of certain components between the two, such as a dryer, a gas-liquid separator, a liquid accumulator, a control element, a valve etc. are arranged on the connecting pipeline to achieve indirect communication. The throttling device may be various types such as capillary tube, mechanical throttle, electronic expansion valve, thermal expansion valve or throttle solenoid valve. The liquid container 16 is connected with a liquid pipe, and the liquid pipe has a heat exchange section 112 relatively fixed to the evaporator 11. The liquid outlet and the liquid inlet of the heat exchange section 112 communicate with the inner space of the liquid container 16 to form a liquid circulation. When the evaporator is in operation, the liquid circulation flow path is cooled by the evaporator, so that the liquid flowing in the liquid pipe is cooled, and the liquid in the liquid container is cooled.

The evaporator 11 includes a heat-conducting base 113 and a refrigerant tube 111 , the heat-conducting base 113 basically covers the refrigerant tube 111 of the evaporator and the heat exchange section 112 of the liquid tube, and the refrigerant tube 111 is relatively fixed to the heat-conducting base 113 Inside, the heat exchange section 112 of the liquid tube is relatively fixed in the heat conduction base 113, so that the refrigerant tube 111 of the evaporator and the heat exchange section 113 of the liquid tube are in contact through the heat conduction base 113 for heat transfer. . The refrigerant inlet and refrigerant outlet of the refrigerant tube 111 of the evaporator extend out of the heat conducting base 113 , and the liquid inlet and the liquid outlet of the liquid tube heat exchange section 112 extend outside the heat conducting base 113 . Hereinafter, the refrigerant pipe 111 , the heat exchange section 112 and the heat-conducting base 113 of the evaporator are used as the cooling component 110 , and the cooling component 110 and the liquid container 16 are arranged horizontally or approximately horizontally. This arrangement is beneficial to the cooling component 110 and the liquid container 16 . The pipeline layout is simple and neat, which is conducive to the compactness and miniaturization of the overall product.

Referring to FIG. 3 , the refrigerant tube 111 of the evaporator 11 and the heat exchange section 112 of the liquid tube are respectively coiled in the form of coils to form multiple coiled surfaces, wherein the multiple coiled surfaces formed by coiling the refrigerant tube 111 are not on the same plane , the multiple coiled surfaces formed by the coiling of the heat exchange section 112 are not in the same plane. The evaporator 11 includes a refrigerant inlet 1112 and a refrigerant outlet 1113. The refrigerant inlet 1112 and the refrigerant outlet 1113 extend out of the coiled surface of the refrigerant pipe 111 and are located outside the heat conducting base 113. The heat exchange section of the liquid pipe 112 has a liquid inlet 1122 and a liquid outlet 1123, the liquid inlet and the liquid outlet extend outside the coiled surface of the heat exchange section 112 and are located outside the thermally conductive base 113, the refrigerant inlet 1112, the refrigerant outlet 1113 and the compressor 12. The condenser 13 and the throttling device 14 are connected by pipelines to form a refrigerant circulation system. The refrigerant in the evaporator is in contact with the liquid in the heat exchange section 112 of the liquid pipe through the heat-conducting base 113 and conducts heat transfer. During the operation of the cooling device, the refrigerant flowing through the evaporator uses the heat-conducting base as a heat-conducting medium, from the heat-conducting base 113. Heat is absorbed in the liquid in the heat exchange section, the thermally conductive base 113 basically covers the outer surfaces of the refrigerant tubes 111 and the heat exchange section 112 , and the thermally conductive base 113 absorbs the cold energy of the refrigerant in the refrigerant tube 111 to serve as a cooling source for the heat exchange section 112 , the heat-conducting base 113 has the function of storing cold. By setting the heat-conducting base, a good cooling effect can be achieved, and the user's requirement for cooling liquid can be met. The refrigerant tube 111 of the evaporator and the heat exchange section 112 are indirectly in contact with the heat transfer base 113, and the two are not in direct contact, so as to avoid contamination of the liquid in the heat exchange section 112 when the refrigerant leaks, and improve the drinking safety performance of the cooling device. In this embodiment, the plurality of coiled surfaces formed by the refrigerant tubes 111 and the heat exchange sections 112 are distributed in the cooling assembly 110 , which can increase the heat exchange area between the refrigerant tubes, the liquid tubes and the heat-conducting base 113 , thereby enabling refrigeration The refrigerant in the refrigerant pipe 111 rapidly exchanges heat with the liquid in the heat exchange section. 3-4 , the planes of the coiled surfaces formed by the coiling of the refrigerant tube 111 and the heat exchange section 112 are approximately coincident with each other, and the flow direction of the refrigerant in the refrigerant tube 111 and the flow direction of the liquid in the heat exchange section 112 are countercurrent. setting can improve the heat exchange efficiency. Specifically, the flow direction of the refrigerant is roughly opposite to the flow direction of the liquid, that is, the refrigerant at the inlet of the refrigerant pipe and the liquid at the liquid inlet of the heat exchange section are in contact with different areas of the heat-conducting matrix 113, which can improve the exchange rate of the refrigerant in the refrigerant pipe 111. The heat transfer performance of the liquid in the hot section 112 can be better utilized, and the cold storage effect of the thermally conductive base 113 can be better utilized. The refrigerant inlet 1112 , the refrigerant outlet 1113 of the refrigerant pipe 111 , and the liquid inlet 1122 and the liquid outlet 1123 of the heat exchange section are located on the same side of the heat-conducting base 113 , and the structure is relatively simple, which is beneficial to simplify the assembly of the cooling assembly 110 . Specifically, the refrigerant inlet of the refrigerant pipe 111 may be disposed adjacent to the liquid outlet of the heat exchange section 112, and the refrigerant outlet of the refrigerant pipe 111 may be disposed adjacent to the liquid inlet of the heat exchange section 112, so that the pipeline The setup is more compact and the pipeline connections are simple. Specifically, when the cooling assembly 110 is a block in the shape of a square as shown in FIG. 3 , the refrigerant inlet 1112 and the refrigerant outlet 1113 of the refrigerant pipe 111 and the liquid inlet 1122 and the liquid outlet 1123 of the heat exchange section are provided On the same side of the cooling assembly, of course, the refrigerant inlet 1112 of the refrigerant pipe and the liquid outlet 1123 of the heat exchange section can also be arranged on the side of the thermally conductive substrate, and the refrigerant outlet 1113 and the liquid inlet 1122 of the heat exchange section are arranged on the side of the heat-conducting substrate. On the other side of the thermally conductive substrate, the refrigerant flow direction 1111 in the refrigerant tube is opposite to the liquid flow direction 1121 in the heat exchange section, so as to enhance the heat exchange efficiency. It should be known that the shape of the cooling assembly 110 is not limited to the square shape shown in the figure, but can be a cylinder, a prism or other irregular shaped blocks; the refrigerant tube 111 and the heat exchange section 112 are coiled and formed Each coiled surface includes (but is not limited to) approximately circular, elliptical, zigzag, trapezoidal, spiral or irregularly shaped figures.

The coiled surface of the refrigerant tube 111 and the coiled surface of the heat exchange section 112 are roughly parallel to or coincident with the plane. is smaller than the equivalent diameter of the coiled surface of the refrigerant tube 111, the center position of the coiled surface of the heat exchange section 112 and the center position of the coiled surface of the refrigerant tube 111 are coincident or approximately coincident or located in the same straight line, and the refrigerant tubes 111 are adjacent to two The distance between the coiled surfaces is approximately the same as the distance between two adjacent coiled surfaces of the heat exchange section. For ease of expression, here the coiled pipe body with a relatively large equivalent diameter can be defined as the first coiled body 1110 , and the coiled pipe body with a relatively small equivalent diameter is defined as the second coiled body 1120 , for example, the first coiled body 1110 is the refrigerant Tube coil body, the second coil body 1120 is a heat exchange section coil body, the first coil body 1110 covers the second coil body 1120, and the first coil body and the second coil body are coiled at approximately the same interval. Of course, refrigeration The agent tube can also be coiled to form a second coil, and the heat exchange section can be coiled to form a first coil. The refrigerant pipe 111 and the heat exchange section 112 are coiled and arranged in the heat conducting matrix in the above-mentioned manner, which can reduce the volume of the cooling assembly and increase the heat exchange area relatively.

As shown in FIG. 5 , the coiled surface of the refrigerant tube 111 ′ can also be approximately parallel to the plane where the coiled surface of the heat exchange section 112 ′ is located. The heat exchange area is relatively increased, wherein the equivalent diameter of the coiled surface of the heat exchange section 112' is approximately equal to the equivalent diameter of the coiled surface of the refrigerant tube 111', and the center position of the coiled surface of the heat exchange section 112 is the same as the coiled surface of the refrigerant tube of the evaporator. The center positions of the heat exchange sections 112' and 111' of the refrigerant tubes are arranged at a staggered interval, and the plurality of coiled surfaces of the refrigerant tubes and the plurality of coiled surfaces of the heat exchange section 112' are arranged in a staggered interval. The coiled surfaces may be equidistantly spaced or unequally spaced. For example, in Figure 5, the refrigerant tube forms the first coil A, the heat exchange section forms the second coil B, A is represented by a solid line, B is represented by a dotted line, the equivalent diameter of each coiled surface of the first and second coils Roughly the same, the first and second coils are staggered in the heat-conducting base, and the heat-conducting base can fully act as a heat transfer medium between the liquid in the second coil and the refrigerant in the first coil, and the cooling effect is good. The flow direction 1111' of the refrigerant in the refrigerant tube of the evaporator is different from the flow direction 1121' of the liquid in the liquid tube. For example, the flow direction of the refrigerant and the flow direction of the liquid are set in countercurrent, which can improve the heat exchange efficiency. Specifically, the refrigerant inlet 1112' of the refrigerant pipe may be located on the left side of the cooling assembly 110', and the liquid inlet 1122' of the heat exchange section may be located on other different sides of the cooling assembly 110' opposite to the left side, such as On the right side or the front, rear, upper and lower sides, the refrigerant flow direction 1111' in the refrigerant pipe is opposite to the liquid flow direction 1121' in the heat exchange section.

As shown in Figures 6 and 7 , the coiled surface of the heat exchange section 112'' and the plane of the coiled surface of the refrigerant tube 111'' are arranged approximately intersecting, for example, substantially vertical. The coiled surface of the refrigerant tube 111 ″ may completely or partially cover the coiled surface of the heat exchange section 112 ″, or the coiled surface of the refrigerant tube 111 ″ may be completely covered by the coiled surface of the heat exchange section 112 ″ Covered or partially covered, each coiled surface of the refrigerant tube 111 ″ intersects with each coiled surface of the heat exchange section 112 ″, so that the refrigerant tube and the heat exchange section are partially covered with each other, which is not only conducive to enhancing the heat transfer performance , and it is beneficial for the refrigerant pipes of the same length and the heat exchange section to occupy less space. The flow direction 1111 ″ of the refrigerant in the refrigerant tube of the evaporator is different from the flow direction 1121 ″ of the liquid in the heat exchange section, such as crossing, so as to further improve the flow direction of the refrigerant in the refrigerant tube 111 ″ and the liquid in the heat exchange section. The heat transfer performance can be improved and the cold storage effect of the thermally conductive base 113 ″ can be better utilized. For example, as shown in FIG. 6 , the refrigerant inlet 1112 ″ of the refrigerant pipe and the liquid inlet 1122 ″ of the heat exchange section are arranged on different sides of the thermally conductive substrate, and the refrigerant inlet 1112 ″ of the refrigerant pipe Not adjacent to the liquid inlet 1122'' of the heat exchange section; the outlet 1113'' of the refrigerant tube and the liquid outlet 1123'' of the heat exchange section are arranged on different sides of the heat-conducting substrate, and the outlet 1113' of the refrigerant tube 'It is not adjacent to the liquid outlet 1123'' of the heat exchange section, so as to avoid that the refrigerant that has just entered the cooling component and the liquid contact the same area of the heat-conducting matrix, which will affect the heat-exchange performance.

The melting points of the liquid tubes, especially the heat exchange section 112 and the refrigerant tube 111 are both larger than the thermally conductive base 113. For example, the thermally conductive base may specifically be an aluminum casting, which is molten aluminum cast on the refrigerant tube 111 and the heat exchange section. 112 around the block formed after cooling. The melting point of the material used in the refrigerant pipe and heat exchange section is higher than that of aluminum. For example, the material used in the refrigerant pipe is copper. On the one hand, the melting point of copper is higher than that of aluminum, which will not cause damage to the refrigerant pipe during the aluminum casting process; on the other hand, Copper has good thermal conductivity, which is beneficial to the heat transfer between the refrigerant in the refrigerant tube and the heat-conducting matrix. Further, the outside of the refrigerant pipe is subjected to anti-corrosion treatment to avoid pipeline aging and improve safety performance. When the cooling device is used in the food field, both the liquid pipe and the liquid container are made of food-grade stainless steel, such as 304 stainless steel. On the one hand, the melting point of food-grade stainless steel is greater than that of aluminum, so the liquid pipe will not be damaged during the aluminum casting process; On the one hand, the use of food-grade stainless steel can ensure the drinking safety of the liquid in the liquid pipe and liquid container. In addition, the cooling component is also coated with a thermal insulation material outside the thermally conductive substrate, so that the cooling component is insulated from the outside, and the thermal insulation effect is good. The thermal insulation material here is generally a material whose thermal coefficient is less than or equal to 0.2, such as polyurethane foam, polystyrene foam, modified magnesite foam, microporous calcium silicate, glass wool, rock wool, aluminum silicate fiber Cotton, metal coating, insulating plastic reflective film, insulating paper, metal foil or the like.

The liquid inlet and outlet of the heat exchange section 112 communicate with the inner space of the liquid container 16, thereby forming a liquid circulation flow path between the liquid container 16 and the liquid pipe. The liquid circulation flow path is provided with a fluid pump 17. The fluid pump 17 is located at the connecting pipeline between the liquid container 16 and the heat exchange section of the liquid pipe, and the fluid pump 17 is used to supply the power source of the liquid circulation. The liquid container 16 has a liquid inlet pipe 161 and a cooling liquid outlet 162 extending out of the box. The liquid inlet pipe 161 is provided with a liquid pipe switch 1610, which can control the liquid flow of the liquid inlet pipe. The liquid inlet pipe 161 is connected with the external water source to provide the liquid inlet of the cooling device. When the user has a demand for cold liquid, the cold liquid in the liquid container can be supplied with the cooling liquid through the cold liquid outlet 162; the liquid inlet pipe 161 and the cold liquid outlet 162 The specific position of the cooling tube is not limited, and can be set on the upper, lower and side parts of the box according to the convenience of the user; the liquid inlet pipeline 161 is provided with a liquid pipeline switch 1610 for opening and closing the liquid inlet; the cooling liquid outlet 162 is provided A liquid outlet valve 1620 is provided for opening and closing the supply of cooling liquid according to user instructions. Herein, the liquid container 16 is, for example, a water tank, and the liquid flowing in the liquid pipe is, for example, water. In this way, the cooling device of this embodiment can be used to produce low-temperature water.

The liquid cycle in this embodiment is as follows: the fluid pump 17 is started, and the liquid in the liquid container 16 is pumped to the liquid pipe by the fluid pump 17. Since the outer periphery of the refrigerant pipe 111 and the heat exchange section 112 of the liquid pipe is filled with the heat-conducting matrix 113, and the cooling The refrigerant in the agent tube 111 absorbs heat from the heat-conducting base 113 and evaporates, so that the heat-conducting base 113 is cooled down. When the liquid in the heat exchange section 112 flows, the heat-conducting base 113 absorbs the heat of the liquid in the heat exchange section 112 and makes itself become The cooling liquid then enters the liquid container 16 through the liquid outlet. When the user needs to cool the liquid, open the liquid outlet valve 1620 provided at the cooling liquid outlet 162 of the cooling device to obtain the required cooling liquid. The liquid pipeline switch 1610 will be automatically opened to replenish the liquid, so that a certain amount of liquid is always kept in the liquid container 16 . Since the heat-conducting base 13 completely surrounds the refrigerant pipes, when the refrigerant circulation system is started for a certain period of time, such as 5 minutes, it is considered that the heat-conducting base 113 has been completely cooled. In this case, even if the refrigerant circulation system is not started, the heat exchange The liquid flowing in the section 112 can also realize the cooling of the liquid in the heat exchange section 112 through the cold storage of the heat-conducting matrix 13 . The cooling device of this embodiment further includes a temperature detection device (not shown), which can directly or indirectly detect the liquid temperature parameter T at the liquid container 16 or the liquid pipe. The temperature detection device can be, for example, a temperature sensor. The cooling device is provided with a central controller to receive the signal output by the temperature detection device, and according to the temperature detection result, provide specific control signals for corresponding components (such as liquid pipeline switches). The temperature detection device can be disposed inside the liquid container 16 to detect the liquid temperature in the liquid container 16 . Of course, the temperature detection device can also be arranged at the cold liquid outlet of the liquid container or the connection part of the liquid pipe and the liquid container or the connection part of the liquid pipe and the fluid pump, for directly or indirectly detecting the liquid temperature parameter T at the liquid container or the liquid pipe. The central controller is also electrically connected with the fluid pump 17 to operate the fluid pump 17 according to the signal obtained by the temperature detection device. The temperature setting target Tset may be a specific value or a regional range value or a change trend of temperature, or other temperature characteristic parameters. The central controller judges whether the temperature setting target Tset is satisfied according to the temperature parameter T detected by the temperature detection device, if so, the compressor stops and the liquid circulation flow path stops running, and the central controller gives a signal that the fluid pump stops; If not, the compressor operates and the liquid circulation circuit circulates, and the central controller gives a signal to start the operation of the fluid pump.

The cooling device in this embodiment further includes a liquid level detection device (not shown), which can directly or indirectly detect the liquid level parameter L of the liquid in the liquid container, and determine whether the detected liquid level parameter L satisfies the liquid level. The bit sets the target Lset, if yes, do not fill the liquid container; if not, fill the liquid container with liquid. For example, the liquid level detection device can be a liquid level sensor or a liquid level switch or a floating liquid level sensor, and the liquid level detection device can be one or more. The cooling device receives the signal output by the liquid level detection device by setting the central controller to realize automatic control. The liquid level detection device can be arranged inside the liquid container to detect the liquid level in the liquid container. The central controller is also electrically connected with the liquid pipeline switch arranged at the liquid inlet pipeline of the liquid container, so as to operate the liquid pipeline switch according to the signal obtained by the liquid level detection device. Specifically, the liquid pipeline switch may be a water inlet valve. Wherein, the liquid level setting target Lset may be a specific value or an upper or lower set liquid level threshold value or a change trend of the liquid level, or other liquid level characteristic parameters. When the liquid level detection device is a liquid level sensor, the liquid level sensor and the liquid pipeline switch are both electrically connected to the central controller, the liquid level setting target Lset is preset in the central controller, and the liquid level sensor is at least There are two, which can be respectively set at two positions inside the liquid container corresponding to the upper and lower set liquid level thresholds, according to the liquid level parameter L detected by the at least two liquid level sensors and the liquid level setting target Lset (The upper and lower set liquid level thresholds) of the comparison results, the cooling device controls the circulation of the liquid inlet pipeline through the liquid pipeline switch, and one of the liquid level sensors detects that the liquid level parameter L in the liquid container is higher than the set value. The above set liquid level threshold, by closing the liquid pipeline switch, the liquid container can be controlled to stop feeding liquid, and another liquid level sensor detects that the liquid level parameter L in the liquid container is lower than the lower set liquid level threshold, and the liquid level parameter L is lower than the lower set liquid level threshold. Turning on the pipeline switch can control the liquid container to enter the liquid until the liquid level parameter L reaches the liquid level setting target Lset.

In other embodiments, when the liquid level detection device is a floating liquid level sensor, the liquid level setting target Lset is correspondingly configured in the floating liquid level sensor in advance, and the floating liquid level sensor has a detection part, The detection part can rise as the liquid level of the liquid in the liquid container rises, or fall as the liquid level of the liquid in the liquid container decreases. At this time, the water inlet valve may not be provided to control the liquid inlet pipeline. The trigger switch structure is used to cooperate with the floating liquid level sensor to realize the circulation or cutoff of the liquid inlet pipeline. At this time, the liquid level setting target Lset can be a specific liquid level target or a specific liquid level target +/-Δ, if When the liquid level in the liquid container is above the liquid level set target Lset, the detection part of the floating liquid level sensor is lifted, which can trigger the switch structure, so that the liquid flow of the liquid inlet pipeline is cut off to control the The liquid container stops feeding liquid. When the liquid level in the liquid container reaches below the set liquid level target Lset, the detection part of the floating liquid level sensor descends, and the switch is triggered again to make the liquid flow in the liquid inlet pipeline. Control the liquid container to enter the liquid until the liquid level rises back to the liquid level set target L.

Referring to FIG. 7 , the specific steps of the cooling device with respect to the control method of liquid temperature and liquid level include:

S1: turn on the power and supply power to the cooling device, and execute step S2;

S2: The liquid level detection device detects the liquid level parameter L of the liquid in the liquid container, and executes step S3;

S3: determine whether the liquid level parameter L detected by the liquid level detection device meets the liquid level setting target Lset, if not, go to step S4; if so, go to step S5;

S4: The central controller controls the switch of the liquid pipeline to open, and the liquid container is filled with liquid. After the interval is set, step S2 is performed;

S5: the central controller controls the switch of the liquid pipeline to close, and the liquid container stops feeding liquid, and executes step S6;

S6: the temperature detection device detects the temperature parameter T of the liquid in the liquid container or the liquid pipe, and executes step S7;

S7: determine whether the temperature parameter T detected by the temperature detection device satisfies the temperature setting target Tset in the central controller, if yes, go to step S8, if not, go to step S9;

S8: The central controller gives a signal that the liquid circulation in the compressor and the liquid circulation flow path is in a stopped state, and the liquid container does not supply liquid to the liquid pipe. Specifically, the central controller controls the fluid pump to be in a closed state, so that the liquid circulation flows The circuit stops circulating, and after the interval set time, step S2 is performed;

S9: The compressor operates and the liquid circulation flow path is controlled by the central controller to perform cyclic operation. Specifically, the central controller controls the fluid pump to start and operate, so that the liquid circulation flow path circulates, and step S6 is performed during the circulation process.

In the above step S8, the interval setting time t can be 10-20s, for example, 15s; in step S9, the compressor is running and the fluid pump is running, and the cooling device is in a cooling state at this time, and the user generally does not take liquid. At this time, the temperature will gradually decrease, but will not increase; and then judge for many times according to the temperature parameter T detected in step S6, and stop the compressor and the fluid pump until the temperature meets the temperature set target Tset. Through the above control method, a certain amount of liquid can always be kept in the liquid container, and the temperature of the liquid provided by the cold liquid outlet of the liquid container can be 0-5°C, which can meet the user's requirements for the temperature and dosage of the cold liquid in time. It is a low temperature drinking ice water or ice water mixture or other low temperature liquid for industrial purposes at a temperature of 0 ° C to 5 ° C. The obtained ice water or ice water mixture can be used to mix coffee, fruit pulp or other raw materials to make ice drinks. It can also be used to cool wine, fruit juice or other liquids to liquids or solid-liquid mixtures that are close to freezing temperature, and taste better when drinking.

It should be noted that the above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention. Although the present specification has been described in detail with reference to the above-mentioned embodiments, it should be understood by those of ordinary skill in the art that those skilled in the art can still combine, modify or modify the present invention. Equivalent replacement, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims (8)

1. A cooling device, comprising a compressor, a condenser, a throttling device, an evaporator, the outlet of the compressor is communicated with the inlet of the condenser, and the outlet of the condenser is communicated with the inlet of the throttling device communication, the outlet of the throttling device is communicated with the inlet of the evaporator, and the outlet of the evaporator is communicated with the inlet of the compressor; The cooling device further includes a liquid pipe and a liquid container, the liquid pipe has a heat exchange section relatively fixed to the evaporator, and the liquid outlet and the liquid inlet of the heat exchange section are connected to the inner space of the liquid container. The liquid circulation flow path is connected to form a liquid circulation flow path. When the evaporator works, the liquid circulation flow path passes through the evaporator to cool down, and the liquid container is also provided with a cold liquid outlet; The cooling device includes a temperature detection device, which can directly or indirectly detect the liquid temperature parameter at the liquid container, or the temperature detection device can directly or indirectly detect the liquid temperature parameter at the liquid pipe; The liquid container is connected with a liquid inlet pipeline, and the liquid inlet pipeline is provided with a liquid pipeline switch, which can control the liquid circulation of the liquid inlet pipeline; The liquid circulation flow path is provided with a fluid pump, and the fluid pump is located at the connecting pipeline between the liquid container and the heat exchange section of the liquid pipe; The evaporator includes a heat-conducting base that covers the heat-exchange section between the refrigerant tube of the evaporator and the liquid tube, and the heat-exchange section of the evaporator's refrigerant tube and the liquid tube are respectively separated by A plurality of coiled surfaces are formed by coiling in the form of a coil. The coiled surface of the refrigerant tube and the plane of the coiled surface of the heat exchange section are substantially parallel or coincident with each other. The flow direction of the refrigerant in the refrigerant tube of the evaporator The flow direction of the liquid in the heat exchange section is set in the opposite direction; or, the coiled surface of the refrigerant tube of the evaporator and the plane of the coiled surface of the heat exchange section intersect with each other, and the refrigerant in the refrigerant tube of the evaporator The flow direction of the heat exchange section is crossed with the flow direction of the liquid in the heat exchange section. 2 . The cooling device according to claim 1 , wherein: the refrigerant pipe of the evaporator is relatively fixed in the heat conduction base, the heat exchange section is relatively fixed in the heat conduction base, and the heat exchange section is relatively fixed in the heat conduction base. 3 . The hot section and the refrigerant tube of the evaporator are in contact through the heat-conducting substrate, the refrigerant inlet and the refrigerant outlet of the evaporator extend out of the heat-conducting substrate, and the liquid inlet of the heat exchange section and the liquid outlet extends out of the thermally conductive base. 3. The cooling device according to claim 2, wherein the coiled surface of the refrigerant pipe of the evaporator and the plane of the coiled surface of the heat exchange section are substantially parallel to or coincide with each other, and the The refrigerant inlet, the refrigerant outlet, and the liquid inlet and the liquid outlet of the heat exchange section are located on the same side of the heat conducting base. 4. The cooling device according to claim 2, wherein each coiled surface formed by the coiling of the refrigerant tube of the evaporator and the heat exchange section is approximately circular or elliptical or zigzag or trapezoidal or Spiral. 5. The cooling device according to claim 2, 3 or 4, wherein the coiled surface of the refrigerant tube of the evaporator is substantially parallel to or coincides with the plane of the coiled surface of the heat exchange section, and the The equivalent diameter of the coiled surface of the hot section is larger or smaller than the equivalent diameter of the coiled surface of the refrigerant tube, and the center position of the coiled surface of the heat exchange section and the center position of the coiled surface of the refrigerant tube are substantially coincident or located on the same straight line, so The distance between the adjacent two coiled surfaces of the refrigerant tube is approximately the same as the distance between the adjacent two coiled surfaces of the heat exchange section; Or the equivalent diameter of the coiled surface of the heat exchange section is approximately equal to the equivalent diameter of the coiled surface of the refrigerant tube, and the center position of the coiled surface of the heat exchange section and the center position of the coiled surface of the refrigerant tube are substantially coincident or located at the same In a straight line, the plurality of coiled surfaces of the refrigerant tube and the plurality of coiled surfaces formed by the heat exchange section are arranged in a staggered interval. 6. A control method for a cooling device, the cooling device is the cooling device according to any one of claims 1-4, comprising: By setting the liquid level detection device, the cooling device can directly or indirectly detect the liquid level parameters of the liquid in the liquid container, and judge whether the detected liquid level parameters meet the liquid level setting target, and if so, the liquid container is not filled with liquid. ; if no, fill the liquid container; The cooling device can directly or indirectly detect the temperature parameters of the liquid at the liquid container or the liquid pipe by setting the temperature detection device, and judge whether the detected temperature parameters meet the temperature setting target, if so, the compressor stops and the liquid circulation flows. circuit stops circulating; if not, the compressor operates and the liquid circulation flow path operates. 7 . The control method according to claim 6 , wherein the cooling device controls the liquid inlet or the non-liquid inlet of the liquid container by arranging a liquid pipeline switch at the liquid inlet pipeline outside the liquid container; further, the The cooling device controls the opening or closing of the liquid pipeline switch by setting the central controller to be electrically connected to the liquid pipeline switch; if the liquid level parameter meets the liquid level setting target, the central controller controls the liquid pipeline switch. When the pipeline switch is closed, the liquid container stops feeding liquid; if the liquid level parameter does not meet the liquid level setting target, the central controller controls the liquid level pipeline switch to open, and the liquid level container is filled with liquid. 8. The control method according to claim 6, wherein the cooling device provides power for the operation of the liquid circulation flow path by connecting a fluid pump between the liquid container and the liquid pipe, and the cooling device passes The central controller is electrically connected to the fluid pump to control the operation of the fluid pump; if the temperature parameter detected by the temperature detection device does not meet the temperature setting target, the central controller provides a control signal for starting the fluid pump to circulate the liquid The flow path runs; if the temperature parameters meet the temperature set target, the central controller sends a control signal to stop the fluid pump to stop the liquid circulation flow path.

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