CN106642838B - Cooling device and control method thereof - Google Patents
Cooling device and control method thereof Download PDFInfo
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- CN106642838B CN106642838B CN201510727168.7A CN201510727168A CN106642838B CN 106642838 B CN106642838 B CN 106642838B CN 201510727168 A CN201510727168 A CN 201510727168A CN 106642838 B CN106642838 B CN 106642838B
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Abstract
The invention discloses a cooling device, which comprises a compressor, a condenser, a throttling device and an evaporator, wherein the outlet of the compressor is communicated with the inlet of the condenser; the cooling device also comprises a liquid pipe and a liquid container, wherein the liquid pipe is provided with a heat exchange section which is relatively fixed with the evaporator, a liquid outlet and a liquid inlet of the heat exchange section are both communicated with the space in the liquid container, so that a liquid circulation flow path is formed, and the liquid container is also provided with a cold liquid outlet; the cooling device comprises a temperature detection device capable of directly or indirectly detecting a liquid temperature parameter at the liquid container or the liquid pipe. The liquid container and the liquid circulation flow path are arranged, the liquid container can store low-temperature liquid cooled by the evaporator, and the liquid can be used in time when the use requirement is met.
Description
Technical Field
The invention relates to the field of refrigeration, in particular to a cooling device and a control method thereof.
Background
With the change of living habits, the consumption population for drinking lower-temperature drinks is gradually increased, and particularly countries in various regions of Europe and America have habits of drinking ice coffee and the like. At present, hot water with higher temperature is adopted for brewing in the process of preparing coffee, ice cubes are added for cooling when needed, more compressor refrigerating devices are adopted in the prior art, such as a compressor ice maker for preparing ice cubes, the compressor ice maker comprises an evaporator, a compressor, a condenser, a throttling element and the like, liquid is frozen into a required form by absorbing heat through a refrigerant, then the ice cubes are taken out from a mold cavity for standby application, ideal drinking temperature can not be reached due to insufficient ice cubes in the using process, otherwise more ice cubes are added, drinks can be diluted along with melting of the ice cubes, and taste is affected.
Disclosure of Invention
The invention aims to provide a cooling device capable of providing low-temperature liquid in time.
In order to achieve the purpose, the invention adopts the following technical scheme: a cooling device comprises a compressor, a condenser, a throttling device and an evaporator, wherein an outlet of the compressor is communicated with an inlet of the condenser, an outlet of the condenser is communicated with an inlet of the throttling device, an outlet of the throttling device is communicated with an inlet of the evaporator, and an outlet of the evaporator is communicated with an inlet of the compressor;
the cooling device also comprises a liquid pipe and a liquid container, wherein the liquid pipe is provided with a heat exchange section which is relatively fixed with the evaporator, a liquid outlet and a liquid inlet of the heat exchange section are communicated with the space in the liquid container to form a liquid circulation flow path, when the evaporator works, the liquid circulation flow path is cooled through the evaporator, and the liquid container is also provided with a cold liquid outlet;
the cooling device comprises a temperature detection device which is capable of directly or indirectly detecting a liquid temperature parameter at the liquid container, or which is capable of directly or indirectly detecting a liquid temperature parameter at the liquid tube.
Furthermore, a liquid inlet pipeline is connected outside the liquid container, 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 which is positioned at a connecting pipeline between the liquid container and the liquid pipe heat exchange section.
Furthermore, the evaporator comprises a heat-conducting base body, the heat-conducting base body coats the refrigerant pipe of the evaporator and the heat exchange section of the liquid pipe, the refrigerant pipe of the evaporator is relatively fixed in the heat-conducting base body, the heat exchange section is in contact with the refrigerant pipe of the evaporator through the heat-conducting base body, the refrigerant inlet and the refrigerant outlet of the evaporator extend outwards of the heat-conducting base body, and the liquid inlet and the liquid outlet of the heat exchange section extend outwards of the heat-conducting base body.
Furthermore, a refrigerant pipe of the evaporator and a heat exchange section of the liquid pipe are respectively coiled in a coil form to form a plurality of coiling surfaces, the planes of the coiling surfaces of the refrigerant pipe and the heat exchange section are mutually approximately parallel or coincident, and the flowing direction of the refrigerant in the refrigerant pipe of the evaporator and the flowing direction of the liquid in the heat exchange section are opposite; or the plane of the coiling surface of the refrigerant pipe of the evaporator and the plane of the coiling surface of the heat exchange section are mutually crossed, and the flowing direction of the refrigerant in the refrigerant pipe of the evaporator and the flowing direction of the liquid in the heat exchange section are arranged in a crossed manner.
Furthermore, the planes of the coiling surface of the refrigerant pipe of the evaporator and the coiling surface of the heat exchange section are mutually approximately parallel or coincident, and the refrigerant inlet and the refrigerant outlet of the refrigerant pipe and the liquid inlet and the liquid outlet of the heat exchange section are positioned on the same side surface of the heat-conducting base body.
Further, each coiling surface formed by coiling the refrigerant pipe of the evaporator and the heat exchange section is approximately circular or elliptical or zigzag or trapezoid or spiral.
Further, the coiling surface of a refrigerant pipe of the evaporator is approximately parallel to or coincided with the plane of the coiling surface of the heat exchange section, the equivalent diameter of the coiling surface of the heat exchange section is larger than or smaller than that of the coiling surface of the refrigerant pipe, the center position of the coiling surface of the heat exchange section is basically coincided with or positioned on the same straight line with the center position of the coiling surface of the refrigerant pipe, and the distance between two adjacent coiling surfaces of the refrigerant pipe is approximately the same as the distance between two adjacent coiling 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 pipe, the center position of the coiled surface of the heat exchange section and the center position of the coiled surface of the refrigerant pipe are basically superposed or positioned on the same straight line, and the plurality of coiled surfaces of the refrigerant pipe and the plurality of coiled surfaces formed by the heat exchange section are arranged in a staggered and spaced mode.
The invention also aims to provide a control method of the cooling device.
In order to achieve the purpose, the invention also adopts the following technical scheme: a control method of a cooling device according to the above technical solution, comprising:
the cooling device can directly or indirectly detect the liquid level parameters of the liquid in the liquid container by arranging the liquid level detection device, and judge whether the detected liquid level parameters meet the liquid level set target, if so, the liquid in the liquid container is not fed; if not, feeding liquid into the liquid container;
the cooling device is provided with a temperature detection device, so that the temperature parameter of liquid at a liquid container or a liquid pipe can be directly or indirectly detected, whether the detected temperature parameter meets a temperature setting target or not is judged, and if yes, the compressor is stopped and the liquid circulation flow path stops circulating; if not, the compressor is operated and the liquid circulation flow path is operated.
Furthermore, the cooling device controls the liquid inlet or non-liquid inlet of the liquid container by arranging a liquid pipeline switch at a liquid inlet pipeline outside the liquid container; the cooling device is electrically connected with the liquid pipeline switch through a central controller to control the on or off 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 be closed, and at the moment, 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 be on to feed liquid into the liquid level container.
Further, 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 controls the operation of the fluid pump by arranging a central controller and electrically connecting the central controller with 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 enable the liquid circulation flow path to operate; if the temperature parameter meets the temperature setting target, the central controller sends a control signal for stopping the fluid pump to stop the circulation of the liquid circulation flow path.
According to the technical scheme, the liquid container and the heat exchange section of the liquid pipe are arranged to form the liquid circulation flow path, the heat exchange section and the evaporator are relatively fixed to exchange heat, the liquid container can store low-temperature liquid cooled by the evaporator, and the liquid container can be used in time when in use demand.
Drawings
FIG. 1 is a schematic perspective view of one embodiment of a cooling device, with the outer box profile omitted;
FIG. 2 is a side view of the cooling device of FIG. 1 with the fan omitted and the arrows indicating the direction of flow of the refrigerant and the direction of flow of the liquid;
FIG. 3 is a schematic view of an embodiment of a cooling assembly of the cooling apparatus of FIG. 1, wherein the arrows indicate the direction of flow of the refrigerant and the direction of flow of the liquid;
FIG. 4 is a schematic cross-sectional view taken along plane I-I of the cooling assembly shown in FIG. 3;
FIG. 5 is a schematic view of another embodiment of a cooling assembly of the cooling apparatus of FIG. 1, wherein the arrows indicate the flow direction of the refrigerant and the flow direction of the liquid, and a portion of the thermally conductive base is omitted;
FIG. 6 is a schematic view of yet another embodiment of a cooling assembly of the cooling apparatus of FIG. 1, wherein the thermally conductive substrate is omitted and the arrows indicate the direction of flow of the refrigerant and the direction of flow of the liquid;
FIG. 7 is a schematic cross-sectional view of the cooling assembly with the thermally conductive base of the cooling device of FIG. 6 taken along plane II-II;
fig. 8 is a schematic view of a portion of the control flow of the cooling apparatus of fig. 1.
Detailed Description
Referring to fig. 1-2, the cooling device 100 of the present embodiment is used to reduce the temperature of the liquid to a predetermined range 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 mixture of 0 ℃ to 5 ℃ or other industrial low-temperature liquids, and the prepared ice water or ice water mixture can be used to mix coffee, fruit pulp or other raw materials to prepare an ice drink, and can also be used to cool wine, fruit juice or other liquids to a temperature close to the freezing point or a liquid or a solid-liquid mixture, and has a good taste when drinking.
The cooling device 100 of the present embodiment includes a case having a mounting cavity in which the evaporator 11, the compressor 12, the condenser 13, the throttle 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 communication between the outlet and the inlet listed here is not limited to the direct communication between the two, and the indirect communication between the two is realized by arranging some components, such as a dryer, a gas-liquid separator, a liquid storage device, a control element, a valve and the like on a connecting pipeline. The throttling device can be various types such as a capillary tube, a mechanical throttling device, an electronic expansion valve, a thermal expansion valve or a throttling electromagnetic valve. The liquid container 16 is connected with a liquid pipe, the liquid pipe is provided with a heat exchange section 112 fixed opposite to the evaporator 11, a liquid outlet and a liquid inlet of the heat exchange section 112 are communicated with the space in the liquid container 16, so that a liquid circulation flow path is formed, and when the evaporator works, the liquid circulation flow path is cooled through the evaporator, so that the liquid flowing in the liquid pipe is cooled, and the liquid in the liquid container is cold liquid.
The evaporator 11 includes a heat conductive base 113 and a refrigerant tube 111, the heat conductive base 113 substantially covers the refrigerant tube 111 and the heat exchange section 112 of the liquid tube of the evaporator, the refrigerant tube 111 is relatively fixed in the heat conductive base 113, and the heat exchange section 112 of the liquid tube is relatively fixed in the heat conductive base 113, so that the refrigerant tube 111 and the heat exchange section 113 of the liquid tube of the evaporator are in contact with each other through the heat conductive base 113 for heat transfer. The refrigerant inlet and outlet of the refrigerant pipe 111 of the evaporator extend out of the heat conducting base 113, and the liquid inlet and outlet of the liquid pipe heat exchanging section 112 extend out of the heat conducting base 113. The refrigerant pipe 111, the heat exchange section 112 and the heat conducting base 113 of the evaporator are used as the cooling assembly 110, and the cooling assembly 110 and the liquid container 16 are horizontally arranged or approximately horizontally arranged, so that the arrangement mode is favorable for the pipeline arrangement between the cooling assembly 110 and the liquid container 16, the pipeline layout is simple and neat, and the structure of the whole product is compact and miniaturized.
Referring to fig. 3, the refrigerant pipe 111 of the evaporator 11 and the heat exchange section 112 of the liquid pipe are respectively coiled in a coil form to form a plurality of coiled surfaces, wherein the plurality of coiled surfaces formed by coiling the refrigerant pipe 111 are not in the same plane, and the plurality of coiled surfaces formed by coiling 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 winding surface of the refrigerant tube 111 and are located outside the heat-conducting substrate 113, the heat exchange section 112 of the liquid tube has an liquid inlet 1122 and a liquid outlet 1123, the liquid inlet and the liquid outlet extend out of the winding surface of the heat exchange section 112 and are located outside the heat-conducting substrate 113, and the refrigerant inlet 1112 and the refrigerant outlet 1113 are connected with the compressor 12, the condenser 13 and the throttling device 14 through pipelines to form a refrigerant circulation system. The refrigerant in the evaporator contacts with the liquid in the heat exchange section 112 of the liquid pipe through the heat conduction base body 113 for heat transfer, in the operation process of the cooling device, the refrigerant flowing through the evaporator utilizes the heat conduction base body as a heat conduction medium to absorb heat from the liquid in the heat exchange section, the heat conduction base body 113 basically covers the outer surfaces of the refrigerant pipe 111 and the heat exchange section 112, the heat conduction base body 113 absorbs the cold energy of the refrigerant in the refrigerant pipe 111 to serve as a cold source of the heat exchange section 112, the heat conduction base body 113 has the function of cold accumulation, good cooling effect can be achieved through the arrangement of the heat conduction base body, and the requirement of a user on the cooling liquid is. The refrigerant pipe 111 and the heat exchange section 112 of the evaporator are in indirect contact through the heat conducting base body 113, and the two are not in direct contact, so that liquid in the heat exchange section 112 is prevented from being polluted when the refrigerant leaks, and the drinking safety performance of the cooling device is improved. In this embodiment, the plurality of coiled surfaces formed by the refrigerant tube 111 and the heat exchange section 112 are distributed in the cooling module 110, so that the heat exchange area between the refrigerant tube, the liquid tube and the heat conductive base 113 can be increased, and the refrigerant in the refrigerant tube 111 can rapidly exchange heat with the liquid in the heat exchange section. Referring to fig. 3 to 4, the planes of the coiling surfaces formed by coiling the refrigerant pipe 111 and the heat exchange section 112 are substantially overlapped with each other, and the flow direction of the refrigerant in the refrigerant pipe 111 and the flow direction of the liquid in the heat exchange section 112 are arranged in a counter-flow manner, so that the heat exchange efficiency can be improved. Specifically, the refrigerant flow direction is substantially opposite to the liquid flow direction, that is, the refrigerant at the refrigerant pipe inlet and the liquid at the heat exchange section inlet contact different areas of the heat-conducting substrate 113, so that the heat transfer performance between the refrigerant in the refrigerant pipe 111 and the liquid in the heat exchange section 112 can be improved, and the cold storage function of the heat-conducting substrate 113 can be better utilized. 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 located on the same side of the heat conducting substrate 113, so that the structure is relatively simple, and the assembly of the cooling module 110 is simplified. Specifically, when the cooling assembly 110 is a block body in a square shape 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 disposed on the same side of the cooling assembly, and of course, the refrigerant inlet 1112 and the liquid outlet 1123 of the refrigerant pipe and the liquid outlet 1122 of the heat exchange section may also be disposed on one side of the heat-conducting substrate, and the refrigerant outlet 1113 and the liquid inlet 1122 of the heat exchange section are disposed on the other side of the heat-conducting substrate, so that the refrigerant flowing direction 1111 in the refrigerant pipe is opposite to the liquid flowing direction 1121 in the. It should be understood that the shape of the cooling module 110 is not limited to the square shape shown in the figure, but may be a cylinder, prism or other irregular block; each of the winding surfaces formed by winding the refrigerant pipe 111 and the heat exchange section 112 includes, but is not limited to, a pattern of an approximately circular shape, an oval shape, a zigzag shape, a trapezoidal shape, a spiral shape, or an irregular shape.
The coiling surface of the refrigerant pipe 111 is approximately parallel to or coincident with the plane of the coiling surface of the heat exchange section 112, the refrigerant pipe 111 and the heat exchange section 112 are coiled in a concentric mode, wherein the equivalent diameter of the coiling surface of the heat exchange section 112 is larger than or smaller than that of the coiling surface of the refrigerant pipe 111, the center position of the coiling surface of the heat exchange section 112 is coincident with or approximately coincident with or located on the same straight line with the center position of the coiling surface of the refrigerant pipe 111, and the distance between two adjacent coiling surfaces of the refrigerant pipe 111 is approximately the same as that between two adjacent coiling surfaces of the heat exchange section. For convenience of expression, a first coiled body 1110 can be defined as a relatively large equivalent diameter coiled body, and a second coiled body 1120 can be defined as a relatively small equivalent diameter coiled body, for example, the first coiled body 1110 can be a refrigerant pipe coiled body, the second coiled body 1120 can be a heat exchange section coiled body, the first coiled body 1110 covers the second coiled body 1120, and the first coiled body and the second coiled body are coiled at approximately the same interval, of course, the refrigerant pipe can also be coiled to form the second coiled body, and the heat exchange section can be coiled to form the first coiled body. The refrigerant pipe 111 and the heat exchange section 112 are coiled in the heat conducting base body in the above manner, so that the volume of the cooling assembly can be reduced, and the heat exchange area can be increased relatively.
As shown in fig. 5, the coiled surface of the refrigerant pipe 111 ' may be approximately parallel to the plane of the coiled surface of the heat exchange section 112 ', and the refrigerant pipe 111 ' and the heat exchange section 112 ' are coiled in an overlapping manner, so as to relatively increase the heat exchange area, 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 pipe 111 ', the center position of the coiled surface of the heat exchange section 112 coincides or approximately coincides with the center position of the coiled surface of the refrigerant pipe of the evaporator, and the plurality of coiled surfaces of the heat exchange section 112 ' are staggered and spaced from the plurality of coiled surfaces of the refrigerant pipe 111 ', and the plurality of coiled surfaces of the refrigerant pipe and the plurality of coiled surfaces of the heat exchange section 112 ' may be arranged at equal intervals or different intervals. For example, in fig. 5, the refrigerant pipe forms a first coiled body a, the heat exchange section forms a second coiled body B, a is shown by a solid line, B is shown by a dotted line, the equivalent diameters of the coiled surfaces of the first and second coiled bodies are substantially the same, the first and second coiled bodies are arranged in a staggered manner in the heat conducting matrix, the heat conducting matrix can sufficiently serve as a heat transfer medium between the liquid in the second coiled body and the refrigerant in the first coiled body, and the cooling effect is good. The flow direction 1111 'of the refrigerant in the refrigerant pipe of the evaporator is different from the flow direction 1121' of the liquid in the liquid pipe, for example, the flow direction of the refrigerant and the flow direction of the liquid are arranged in a counter-flow manner, so that the heat exchange efficiency can be improved. Specifically, the refrigerant inlet 1112 'of the refrigerant pipe may be located at the left side of the cooling module 110', the liquid inlet 1122 'of the heat exchange section may be located at other different sides of the cooling module 110' opposite to the left side, such as the right side or the front, rear, upper and lower sides, and the refrigerant flow direction 1111 'of the refrigerant pipe is opposite to the liquid flow direction 1121' of the heat exchange section.
As shown in fig. 6 and 7, the coiled surface of the heat exchange section 112 "and the plane of the coiled surface of the refrigerant pipe 111" are approximately intersected, for example, approximately perpendicular. The coiled surface of the refrigerant pipe 111 ″ may completely or partially cover the coiled surface of the heat exchange section 112 ″ or the coiled surface of the refrigerant pipe 111 ″ may be completely or partially covered by the coiled surface of the heat exchange section 112 ″ and each of the coiled surfaces of the refrigerant pipe 111 ″ intersects with each of the coiled surfaces of the heat exchange section 112 ″ so that the refrigerant pipe and the heat exchange section are partially covered with each other, which is not only beneficial to enhancing the heat transfer performance, but also beneficial to occupying a smaller space with the same length of the refrigerant pipe and the heat exchange section. The flow direction 1111 'of the refrigerant in the refrigerant tube of the evaporator is different from, e.g., intersects, the flow direction 1121' of the liquid in the heat exchange section, so as to further improve the heat transfer performance between the refrigerant in the refrigerant tube 111 'and the liquid in the heat exchange section and better utilize the cold storage function of the heat conductive substrate 113'. For example, as shown in FIG. 6, the refrigerant inlet 1112 "of the refrigerant tube and the liquid inlet 1122" of the heat exchange section are disposed on different sides of the thermally conductive substrate, and the refrigerant inlet 1112 "of the refrigerant tube and the liquid inlet 1122" of the heat exchange section are not disposed adjacent to each other; the outlet 1113 ″ of the refrigerant pipe and the liquid outlet 1123 ″ of the heat exchange section are arranged on different sides of the heat-conducting base body, and the outlet 1113 ″ of the refrigerant pipe and the liquid outlet 1123 ″ of the heat exchange section are not arranged adjacently, so that the situation that the refrigerant just entering the cooling assembly and the liquid contact the same area of the heat-conducting base body to affect the heat exchange performance is avoided.
The liquid pipe, especially the heat exchange section 112 and the refrigerant pipe 111, have a melting point higher than that of the heat conductive substrate 113, for example, the heat conductive substrate may be specifically an aluminum casting, which is a block body formed by casting molten aluminum around the refrigerant pipe 111 and the heat exchange section 112 and then cooling. The melting point of the materials used for the refrigerant pipe and the heat exchange section is larger than that of aluminum, for example, the material used for the refrigerant pipe is copper, on one hand, the melting point of copper is larger than that of aluminum, and the refrigerant pipe cannot be damaged in the aluminum casting process; on the other hand, the copper has better heat conductivity, and is beneficial to the heat transfer between the refrigerant in the refrigerant pipe and the heat-conducting substrate. Furthermore, the refrigerant pipe is externally subjected to anti-corrosion treatment, so that the pipeline aging is avoided, and the safety performance is improved. When the cooling device is applied to the food field, the liquid pipe and the liquid container are made of food-grade stainless steel, such as 304 stainless steel, on one hand, the melting point of the food-grade stainless steel is higher than that of aluminum, and the liquid pipe cannot be damaged in the aluminum casting process; on the other hand, the adoption of food-grade stainless steel can ensure the drinking safety of the liquid in the liquid pipe and the liquid container. In addition, the cooling assembly is further coated with a heat-insulating material outside the heat-conducting base body, so that the cooling assembly is insulated from the outside, and the heat-insulating effect is good. The thermal insulation material herein generally means a material having a thermal conductivity of 0.2 or less, such as polyurethane foam, polystyrene foam, modified magnesite foam, microporous calcium silicate, glass wool, rock wool, aluminum silicate fiber wool, metal coated film, heat insulating plastic reflective film, heat insulating paper, metal foil, or the like.
The liquid inlet and the liquid outlet of the heat exchange section 112 are communicated with the space in the liquid container 16, so as to form 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 for supplying a power source for liquid circulation. Wherein the liquid container 16 has a liquid inlet line 161 extending outside the container body and a cold liquid outlet 162, the liquid inlet line 161 being provided with a liquid line switch 1610 capable of controlling the liquid communication of the liquid inlet line. The liquid inlet line 161 is connected to an external water source to supply the cooling device with a liquid feed, and when a user demands a cooling liquid, the cooling liquid in the liquid container can be supplied to the cooling device through the cooling liquid outlet 162; the specific positions of the liquid inlet pipeline 161 and the cold liquid outlet 162 are not limited, and can be arranged at the upper part, the lower part and the side part of the box body according to the convenience of users; a liquid pipeline switch 1610 is arranged at the liquid inlet pipeline 161 and used for opening and closing liquid inlet; an outlet valve 1620 is provided at the cold liquid outlet 162 for opening and closing the supply of the cooling liquid upon user command. The liquid container 16 is herein a water tank, for example, and the liquid flowing in the liquid pipe is water, for example, so that the cooling device of the present embodiment can be used to prepare low-temperature water.
The liquid circulation of the present embodiment is: the fluid pump 17 is started, the liquid in the liquid container 16 is pumped to the liquid pipe through the fluid pump 17, since the peripheries of the refrigerant pipe 111 and the heat exchange section 112 of the liquid pipe are filled with the heat-conducting base 113, and the refrigerant in the refrigerant pipe 111 absorbs heat from the heat-conducting base 113 to evaporate, so that the heat-conducting base 113 is cooled, when the liquid in the heat exchange section 112 flows through, the heat-conducting base 113 absorbs heat from the liquid in the heat exchange section 112 and turns itself into cooling liquid, and then the cooling liquid enters the liquid container 16 through the liquid outlet. When a user needs to cool the liquid, the liquid outlet valve 1620 disposed at the cold liquid outlet 162 of the cooling device is opened to obtain the required cooling liquid, and if the amount of the liquid in the liquid container 16 is reduced, the liquid pipe switch 1610 disposed at the liquid inlet pipe 161 of the cooling device is automatically opened to supply the liquid, so that a certain amount of the liquid is always retained in the liquid container 16. Since the heat conductive substrate 13 completely surrounds the refrigerant tubes, when the refrigerant cycle system is started for a certain period of time, such as 5 minutes, the heat conductive substrate 113 is considered to be completely cooled, and in such a case, even if the refrigerant cycle system is not started, the liquid flowing in the heat exchange section 112 can cool the liquid in the heat exchange section 112 by the cold stored in the heat conductive substrate 13. The cooling device of the present embodiment further includes a temperature detection device (not shown) capable of directly or indirectly detecting 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, and the cooling device receives a signal output by the temperature detection device through a central controller, and provides a specific control signal for a corresponding element (such as a liquid pipeline switch) according to the temperature detection result. The temperature detection device may be disposed inside the liquid container 16 to detect the temperature of the liquid inside the liquid container 16. Of course, the temperature detecting device may also be disposed at the cold liquid outlet of the liquid container or the connection portion of the liquid pipe and the fluid pump, and is used 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 to the fluid pump 17 for operating the fluid pump 17 according to the signal from the temperature detection device. The temperature setting target Tset may be a specific value or a region range value or a trend of temperature change, or other temperature characteristic parameters. The central controller judges whether the temperature parameter T obtained by the detection of the temperature detection device meets a temperature setting target Tset, if so, the compressor stops and the liquid circulation flow path stops running, and the central controller gives a signal of stopping the fluid pump; if not, the compressor is running and the liquid circulation flow path is circulating, and the central controller gives a signal for starting the operation of the fluid pump.
The cooling device of the present embodiment further includes a liquid level detection device (not shown) that can directly or indirectly detect a liquid level parameter L of the liquid in the liquid container, and determine whether the detected liquid level parameter L satisfies a liquid level setting target Lset, and if so, does not feed the liquid into the liquid container; if not, the liquid is fed into the liquid container. The liquid level detection devices may be, for example, a liquid level sensor or a liquid level switch or a floating type liquid level sensor, and the liquid level detection devices may be one or more. The cooling device is provided with a central controller to receive the signal output by the liquid level detection device so as 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 a liquid pipeline switch arranged at a liquid inlet pipeline of the liquid container so as to operate the liquid pipeline switch according to a signal obtained by the liquid level detection device. The liquid line switch may be a water inlet valve. The liquid level set target Lset may be a specific value, or an upper and lower set liquid level threshold, or a variation 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 with the central controller, a liquid level set target Lset is preset in the central controller, at least two liquid level sensors are respectively arranged at two positions at the inner side of the liquid container corresponding to the upper and lower set liquid level thresholds, the cooling device controls the circulation of the liquid inlet pipeline through the liquid pipeline switch according to the comparison result of the liquid level parameter L detected by the at least two liquid level sensors and the liquid level set target Lset (the upper and lower set liquid level thresholds), one liquid level sensor detects that the liquid level parameter L in the liquid container is higher than the upper set liquid level threshold, the liquid container can be controlled to stop liquid inlet by closing the liquid pipeline switch, the other liquid level sensor detects that the liquid level parameter L in the liquid container is lower than the lower set liquid level threshold, the liquid container can be controlled to feed liquid by opening the pipeline switch until the liquid level parameter L reaches the liquid level set target Lset.
In another embodiment, when the liquid level detecting device is a floating type liquid level sensor, the liquid level set target Lset is pre-correspondingly configured on the floating type liquid level sensor, the floating type liquid level sensor is provided with a detecting part which can rise along with the rise of the liquid level of the liquid in the liquid container or fall along with the fall of the liquid level of the liquid in the liquid container, at this time, a liquid inlet pipeline can be controlled without a water inlet valve, the cooling device can realize the circulation or the cut-off of the liquid inlet pipeline by arranging a trigger switch structure to be matched with the floating type liquid level sensor, at this time, the liquid level set target Lset can be a specific liquid level target or a specific liquid level target +/-delta, if the liquid level position in the liquid container is above the liquid level set target Lset, the detecting part of the floating type liquid level sensor is lifted, the switch structure can be triggered, so, the liquid feeding device is used for controlling the liquid container to stop feeding liquid, when the liquid level position in the liquid container reaches a set liquid level target Lset or below, the detection part of the floating type liquid level sensor descends, the switch is triggered again, liquid in the liquid feeding pipeline circulates, and therefore the liquid container can be controlled to feed liquid until the liquid level position rises back to the liquid level set target L.
Referring to fig. 7, the specific steps of the method for controlling the liquid temperature and the liquid level of the cooling device include:
s1: starting up, supplying power to the cooling device, and executing the step S2;
s2: the liquid level detection device detects a liquid level parameter L of the liquid in the liquid container and executes the step S3;
s3: judging whether the liquid level parameter L detected by the liquid level detection device meets a liquid level set target Lset or not, and if not, executing the step S4; if yes, go to step S5;
s4: the central controller controls the liquid pipeline switch to be switched on, liquid is fed into the liquid container, and after the interval is set for time, the step S2 is executed;
s5: the central controller controls the liquid pipeline switch to be closed, the liquid container stops feeding liquid, and step S6 is executed;
s6: the temperature detecting device detects the temperature parameter T of the liquid in the liquid container or the liquid pipe and executes the step S7;
s7: judging whether the temperature parameter T detected by the temperature detection device meets a temperature setting target Tset in the central controller, if so, executing step S8, otherwise, executing step S9;
s8: the central controller gives a signal that the compressor and the liquid circulation in the liquid circulation flow path are in a stop state, 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 to stop the liquid circulation flow path from circulating, and after a set time interval, the step S2 is executed;
s9: the operation of the compressor and the circulation operation of the liquid circulation flow path are controlled by the central controller, specifically, the central controller controls the fluid pump to start up to operate, so that the liquid circulation flow path circulates, and the step S6 is executed in the circulation process.
In the step S8, the interval setting time t may be 10 to 20S, for example, 15S; in step S9, the compressor and the fluid pump are operated, and the cooling device is in a cooling state, so that the user generally does not take liquid, and the temperature is slowly decreased but not increased; then, the compressor and the fluid pump are stopped until the temperature satisfies the temperature setting target Tset by a plurality of judgments based on the temperature parameter T detected in step S6. By the control method, a certain amount of liquid can be always stored in the liquid container, the temperature of the liquid provided by the cold liquid outlet of the liquid container can be 0-5 ℃, the requirements of users on the temperature and the dosage of the cold liquid can be met in time, the cold liquid can be ice water or ice water mixture or other low-temperature liquid for industrial use which is drunk at a low temperature of 0-5 ℃, the prepared ice water or ice water mixture can be used for mixing coffee, fruit pulp or other raw materials to prepare ice drink, and can also be used for cooling wine, fruit juice or other liquid to the temperature close to the freezing point or the liquid or solid-liquid mixture, and the taste is better when the ice drink is drunk.
It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.
Claims (8)
1. A cooling device comprises a compressor, a condenser, a throttling device and an evaporator, wherein an outlet of the compressor is communicated with an inlet of the condenser, an outlet of the condenser is communicated with an inlet of the throttling device, an outlet of the throttling device is communicated with an inlet of the evaporator, and an outlet of the evaporator is communicated with an inlet of the compressor;
the cooling device also comprises a liquid pipe and a liquid container, wherein the liquid pipe is provided with a heat exchange section which is relatively fixed with the evaporator, a liquid outlet and a liquid inlet of the heat exchange section are communicated with the space in the liquid container to form a liquid circulation flow path, when the evaporator works, the liquid circulation flow path is cooled through the evaporator, and the liquid container is also provided with a cold liquid outlet;
the cooling device comprises a temperature detection device which can directly or indirectly detect the liquid temperature parameter at the liquid container or can directly or indirectly detect the liquid temperature parameter at the liquid pipe;
the liquid container is externally 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 which is positioned at a connecting pipeline between the liquid container and the liquid pipe heat exchange section;
the evaporator comprises a heat-conducting base body, the heat-conducting base body coats a refrigerant pipe of the evaporator and a heat exchange section of a liquid pipe, the refrigerant pipe of the evaporator and the heat exchange section of the liquid pipe are respectively coiled in a coil form to form a plurality of coiling surfaces, the planes of the coiling surfaces of the refrigerant pipe and the heat exchange section are mutually approximately parallel or coincident, and the flowing direction of refrigerant in the refrigerant pipe of the evaporator and the flowing direction of liquid in the heat exchange section are opposite; or the plane of the coiling surface of the refrigerant pipe of the evaporator and the plane of the coiling surface of the heat exchange section are mutually crossed, and the flowing direction of the refrigerant in the refrigerant pipe of the evaporator and the flowing direction of the liquid in the heat exchange section are arranged in a crossed manner.
2. The cooling apparatus of claim 1, wherein: the refrigerant pipe of the evaporator is relatively fixed in the heat conduction base body, the heat exchange section is contacted with the refrigerant pipe of the evaporator through the heat conduction base body, the refrigerant inlet and the refrigerant outlet of the evaporator extend out of the heat conduction base body, and the liquid inlet and the liquid outlet of the heat exchange section extend out of the heat conduction base body.
3. The cooling apparatus of claim 2, wherein: the coiling surface of the refrigerant pipe of the evaporator is approximately parallel to or coincident with the plane of the coiling surface of the heat exchange section, and the refrigerant inlet and the refrigerant outlet of the refrigerant pipe and the liquid inlet and the liquid outlet of the heat exchange section are positioned on the same side surface of the heat-conducting base body.
4. The cooling apparatus of claim 2, wherein: each coiling surface formed by coiling the refrigerant pipe of the evaporator and the heat exchange section is approximately circular or elliptical or zigzag or trapezoidal or spiral.
5. The cooling apparatus according to claim 2, 3 or 4, wherein: the coiling surface of a refrigerant pipe of the evaporator is approximately parallel or coincident with the plane of the coiling surface of the heat exchange section, the equivalent diameter of the coiling surface of the heat exchange section is larger than or smaller than that of the coiling surface of the refrigerant pipe, the center position of the coiling surface of the heat exchange section is basically coincident with or positioned on the same straight line with the center position of the coiling surface of the refrigerant pipe, and the distance between two adjacent coiling surfaces of the refrigerant pipe is approximately the same as that between two adjacent coiling 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 pipe, the center position of the coiled surface of the heat exchange section and the center position of the coiled surface of the refrigerant pipe are basically superposed or positioned on the same straight line, and the plurality of coiled surfaces of the refrigerant pipe and the plurality of coiled surfaces formed by the heat exchange section are arranged in a staggered and spaced mode.
6. A control method of a cooling apparatus according to any one of claims 1 to 4, comprising:
the cooling device can directly or indirectly detect the liquid level parameters of the liquid in the liquid container by arranging the liquid level detection device, and judge whether the detected liquid level parameters meet the liquid level set target, if so, the liquid in the liquid container is not fed; if not, feeding liquid into the liquid container;
the cooling device is provided with a temperature detection device, so that the temperature parameter of liquid at a liquid container or a liquid pipe can be directly or indirectly detected, whether the detected temperature parameter meets a temperature setting target or not is judged, and if yes, the compressor is stopped and the liquid circulation flow path stops circulating; if not, the compressor is operated and the liquid circulation flow path is operated.
7. The control method according to claim 6, characterized in that: the cooling device controls liquid inlet or non-liquid inlet of the liquid container by arranging a liquid pipeline switch at a liquid inlet pipeline outside the liquid container; the cooling device is electrically connected with the liquid pipeline switch through a central controller to control the on or off 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 be closed, and at the moment, 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 be on to feed liquid into the liquid level container.
8. The control method according to claim 6, characterized in that: the cooling device is provided with a fluid pump connected between a 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 with the fluid pump through a central controller 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 enable the liquid circulation flow path to operate; if the temperature parameter meets the temperature setting target, the central controller sends a control signal for stopping the fluid pump to stop the circulation of the liquid circulation flow path.
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| CN201510727168.7A CN106642838B (en) | 2015-10-30 | 2015-10-30 | Cooling device and control method thereof |
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| CN201510727168.7A CN106642838B (en) | 2015-10-30 | 2015-10-30 | Cooling device and control method thereof |
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| CN106642838B true CN106642838B (en) | 2020-12-01 |
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| CN111938444A (en) * | 2020-07-23 | 2020-11-17 | 六安索伊电器制造有限公司 | Refrigerating system for coffee machine |
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Effective date of registration: 20191030 Address after: 310018 289-1, No.12 Baiyang street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Applicant after: Sanhua Micro Channel Heat Exchanger Inc. Address before: 310018 three flower Research Institute, No. 12, 289-3 Avenue, Hangzhou, Zhejiang, Jianggan District Applicant before: HANGZHOU SANHUAJIA ELECTROTHERMAL MANAGEMENT SYSTEM CO., LTD. |
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