Energy accumulator and air conditioner with same

Abstract

The invention discloses an energy accumulator and an air conditioner with the energy accumulator. The energy accumulator comprises a box body and an energy accumulator, the energy storage material plate is arranged in the box body; and the heat exchange tube is arranged in the box body and is embedded in the energy storage material plate. According to the energy accumulator, the energy storage material plate is arranged, the heat exchange pipe is embedded in the energy storage material plate, the phase change latent heat can be improved, the heat conductivity can be improved, the heat exchange performance can be improved, the phase change energy storage density of the energy storage material plate in unit volume is large, and more cold energy can be stored; and the stability of the energy storage material plate can be guaranteed while good contact between the energy storage material plate and the heat exchange medium is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of air treatment equipment, in particular to an accumulator and an air conditioner having the same. Background Art

[0002] Cold storage technology can store low-temperature cold energy and release it at the appropriate time or place to achieve efficient use of cold energy. In the prior art, the temperature of cold storage in the field of air conditioners is mainly concentrated in the range of 0-15°C, and the cold storage material is mainly water. The cold energy is released by absorbing heat through the specific heat capacity of low-temperature water. However, due to the narrow temperature range, the sensible heat storage density of water is not high, about 42kJ / kg. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an accumulator, which can increase the latent heat of phase change, improve thermal conductivity, and enhance heat exchange performance. In addition, the unit volume phase change energy storage density of the energy storage material plate is large, and more cold energy can be stored.

[0004] The present invention also provides an air conditioner, comprising the above-mentioned energy accumulator.

[0005] The accumulator according to the embodiment of the present invention comprises: a box body; an energy storage material plate, which is arranged in the box body; and a heat exchange tube, which is arranged in the box body and embedded in the energy storage material plate.

[0006] The energy accumulator according to the embodiment of the present invention is provided with an energy storage material plate and the heat exchange tube is embedded in the energy storage material plate, so that the phase change latent heat can be increased, the thermal conductivity can be increased, and the heat exchange performance can be improved. In addition, the energy storage material plate has a large unit volume phase change energy storage density, which can store more cold energy, and can ensure the stability of the energy storage material plate while ensuring good contact between the energy storage material plate and the heat exchange medium.

[0007] In addition, the accumulator according to the present invention may also have the following additional technical features:

[0008] In some embodiments, the energy storage material plate is formed by mixing carbon material and ice water, and the ice water includes a mixture of two or more of water, hydrated salt, thermal conductor, thickener and cross-linking agent.

[0009] In some embodiments, the heat exchange tube extends in a zigzag manner along the length direction of the energy storage material plate.

[0010] In some embodiments, the heat exchange tube includes a plurality of tortuous sections and a plurality of connecting sections, the plurality of tortuous sections and the plurality of connecting sections are alternately arranged in the length direction of the energy storage material plate, two adjacent tortuous sections are connected by the connecting sections, each of the tortuous sections includes a first section, a second section, and a third section connected in sequence, the first section and the third section extend in the width direction of the energy storage material plate, the second section and the connecting section extend in the length direction of the energy storage material plate, and the two ends of the connecting section in the length direction are respectively connected to the first section of one of the two adjacent tortuous sections and the third section of the other.

[0011] In some embodiments, a distance between the first section and the third section in the length direction of the energy storage material plate is 18-30 mm.

[0012] In some embodiments, the energy storage material plates are multiple and spaced apart along the thickness direction of the energy storage material plates, and the heat exchange tubes are multiple and correspond one to one to the multiple energy storage material plates.

[0013] In some embodiments, in the thickness direction of the energy storage material plate, the distance between two adjacent heat exchange tubes is 9-15 mm.

[0014] In some embodiments, in the thickness direction of the energy storage material plate, two adjacent heat exchange tubes are staggered in the length direction of the energy storage material plate.

[0015] In some embodiments, some of the plurality of heat exchange tubes are energy-releasing heat exchange tubes, and some are energy-storing heat exchange tubes, and the energy-releasing heat exchange tubes and the energy-storing heat exchange tubes are alternately arranged in the thickness direction of the energy storage material plate.

[0016] In some embodiments, a plurality of the energy-releasing heat exchange tubes are connected in parallel, and a plurality of the energy-storing heat exchange tubes are connected in parallel.

[0017] In some embodiments, the accumulator also includes: a first current collecting part and a second current collecting part, the first current collecting part and the second current collecting part are arranged outside the box body, the first current collecting part has a first current collecting channel, a second current collecting channel, a first port and a second port, the first port is connected to the first current collecting channel, the second port is connected to the second current collecting channel, the second current collecting part has a third current collecting channel, a fourth current collecting channel, a third port and a fourth port, the third port is connected to the third current collecting channel, the fourth port is connected to the fourth current collecting channel, the two ends of the energy release heat exchange tube in the length direction are respectively connected to the first current collecting channel and the third current collecting channel, and the two ends of the energy storage heat exchange tube in the length direction are respectively connected to the second current collecting channel and the fourth current collecting channel.

[0018] In some embodiments, the first current collecting member and the second current collecting member are both located on one side of the box along the width direction of the energy storage material plate and are respectively located at both ends of the box along the length direction of the energy storage material plate; or, the first current collecting member and the second current collecting member are respectively located on both sides of the box along the length direction of the energy storage material plate and are both located at the same end of the box along the width direction of the energy storage material plate; or, one of the first current collecting member and the second current collecting member is located on one side of the box along the width direction of the energy storage material plate, and the other of the first current collecting member and the second current collecting member is located on one side of the box along the length direction of the energy storage material plate, and the first current collecting member and the second current collecting member are both located at the same end of the box along the width direction of the energy storage material plate, and are both located at both ends of the box along the length direction of the energy storage material plate.

[0019] In some embodiments, the heat exchange tube is a copper tube.

[0020] The present invention also provides an air conditioner having the above embodiment.

[0021] According to the air conditioner of the embodiment of the present invention, by providing the above-mentioned energy accumulator, by providing an energy storage material plate and embedding the heat exchange tube in the energy storage material plate, the phase change latent heat can be increased, the thermal conductivity can be increased, and the heat exchange performance can be improved. In addition, the energy storage material plate has a large unit volume phase change energy storage density, can store more cold energy, and can ensure the stability of the energy storage material plate while ensuring good contact between the energy storage material plate and the heat exchange medium.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a partial exploded view of an accumulator according to an embodiment of the present invention from a first angle, wherein the housing is not shown;

[0025] Figure 2 is a partial exploded view of an accumulator according to an embodiment of the present invention from a second angle, wherein the housing is not shown;

[0026] Figure 3 is a partial exploded view of the accumulator according to the embodiment of the present invention from a third angle, wherein the box body is not shown;

[0027] Figure 4 is a perspective view of an accumulator according to an embodiment of the present invention, wherein the energy storage material plate and part of the box body are not shown;

[0028] Figure 5 is a three-dimensional diagram of an accumulator according to an embodiment of the present invention, wherein the first current collecting member and the second current collecting member are both located on one side of the box body along the thickness direction of the energy storage material plate;

[0029] Figure 6 is a three-dimensional diagram of an accumulator according to an embodiment of the present invention, wherein a first current collecting member and a second current collecting member are respectively located on both sides of the box body along the length direction of the energy storage material plate;

[0030] Figure 7 is a three-dimensional diagram of an accumulator according to an embodiment of the present invention, wherein the first current collecting member is located on one side of the box along the thickness direction of the energy storage material plate, and the second current collecting member is located on one side of the box along the length direction of the energy storage material plate;

[0031] Figure 8 is a structural schematic diagram of an air conditioner according to an embodiment of the present invention, wherein the air conditioner is a mobile air conditioner;

[0032] Fig. 9 is a structural schematic diagram of an air conditioner according to an embodiment of the present invention, wherein the air conditioner is a ceiling air conditioner;

[0033] Fig.10 is a cold storage temperature curve of the accumulator according to the first embodiment of the present invention;

[0034] Fig.11 is a cooling temperature curve of the accumulator according to the first embodiment of the present invention;

[0035] Fig.12 is a cooling temperature curve of the accumulator according to the second embodiment of the present invention.

[0036] Reference numerals:

[0037] 100. Accumulator;

[0038] 1. Box body;

[0039] 2. Energy storage material board;

[0040] 3. heat exchange tube; 31. zigzag section; 311. first section; 312. second section; 313. third section; 32. connecting section;

[0041] 4. first current collecting member; 41. first port; 42. second port;

[0042] 5. Second current collector; 51. Third port; 52. Fourth port;

[0043] 200. Mobile air conditioner; 201. Refrigeration charging station; 202. Mobile machine;

[0044] 300. Ceiling air conditioner;

[0045] 61. Compressor; 62. Wind wheel; 63. Condenser; 64. Motor; 65. Heat exchanger; 66. Water pump. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The accumulator 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0051] like Figure 1 , Figure 2 and Figure 4 As shown, the accumulator 100 according to the embodiment of the present invention includes a housing 1 , an energy storage material plate 2 and a heat exchange tube 3 .

[0052] Specifically, the energy storage material plate 2 is arranged in the box body 1, and the box body 1 can protect the energy storage material plate 2, ensure the reliability and stability of the energy accumulator 100, and through the tight compression and sealing of the box body 1, the overall energy density can be improved.

[0053] In the related technology, phase change material is a heat storage / cold storage material that can absorb a large amount of heat and keep the temperature unchanged by using the solid-liquid phase change process of the material. The heat stored in the phase change process is called latent heat, which is much larger than the sensible heat. Usually the phase change latent heat of phase change materials can reach 150-350kJ / kg. There are not many types of phase change materials suitable for household cold storage, mainly: organic phase change materials, the phase change latent heat is about 220kJ / kg, but its density is small, about 0.8g / cm 3 ; Ice, the phase transition temperature is 0℃, the phase transition latent heat is high, ice melts into water and absorbs up to 330kJ / kg of heat, and the density can reach 0.92g / cm 3 , the theoretical density can reach 84kWh / m 3 , the cold storage density is extremely advantageous.

[0054] However, in reality, the cold storage density of accumulators made of ice is far less than that of organic phase change materials. The core reason is that the thermal conductivity of water is low, only 0.6W / m·K, the heat transfer performance is poor, and cold energy is difficult to store and access quickly. In addition, there is also the method of storing cold by making ice into ice slurry. Ice slurry is a mixture of ice and water, which has fluidity and good convective heat transfer performance. However, in order to maintain the fluidity of ice slurry, the ice content in ice slurry generally does not exceed 40%, resulting in insufficient cold storage density of ice slurry. Therefore, the existing ice storage technology is limited by the heat transfer performance of ice, and the cold storage density is far from the theoretical density of ice.

[0055] Furthermore, the energy storage material plate 2 is formed by pressing a powdered phase change material, and the energy storage material plate 2 has a density of 0.98-1.1 g / cm 3 The shaped composite material has a thermal conductivity of 2-10W / m·K above 0°C, a phase change enthalpy range of 290-320kJ / kg, high latent heat of phase change, high thermal conductivity, and a greatly improved heat transfer performance compared to the existing technology. In addition, the unit volume phase change energy storage density of the energy storage material plate 2 is large, which can reach 75-95kWh / m 3 , which meets the requirements of the molding and bonding process, can store more cold energy, and can ensure the stability of the energy storage material plate 2 while ensuring good contact between the energy storage material plate 2 and the heat exchange medium.

[0056] Further, see Appendix Figure 3 and attached Figure 4As shown, the heat exchange tube 3 is arranged in the box body 1 and embedded in the energy storage material plate 2. A heat exchange medium flows in the heat exchange tube 3, and the storage and release of cold energy can be achieved through heat exchange between the heat exchange medium and the energy storage material plate 2. Optionally, the heat exchange medium can be a glycol-water solution that exchanges heat in the form of convection heat exchange, or it can be a refrigerant commonly used in the compressor 61 that exchanges heat in the heat exchange tube 3 through evaporation and condensation.

[0057] The energy accumulator 100 according to the embodiment of the present invention is provided with an energy storage material plate 2 and the heat exchange tube 3 is embedded in the energy storage material plate 2, so that the phase change latent heat can be increased, the thermal conductivity can be increased, and the heat exchange performance can be improved. In addition, the energy storage material plate 2 has a large unit volume phase change energy storage density and can store more cold energy. It can ensure the stability of the energy storage material plate 2 while ensuring good contact between the energy storage material plate 2 and the heat exchange medium.

[0058] In some embodiments of the present invention, the energy storage material plate 2 is formed by mixing carbon material and ice water, and the ice water includes a mixture of two or more of water, hydrated salt, thermal conductor, thickener and cross-linking agent. It can be understood that the carbon material has a microporous structure, which can play a shaping role on the ice water, ensuring that the energy storage material plate 2 will not deform regardless of whether the ice water is in a melted state or a solidified state. Compared with the ice slurry used in the prior art, the stability and reliability are better, the packaging is more convenient, and the uniformity and thermal conductivity can be improved to a certain extent. For example, the ice water can include water and thickener, water and cross-linking agent, hydrated salt and thermal conductor, water, thermal conductor and thickener, or water, hydrated salt, thermal conductor, thickener and cross-linking agent.

[0059] In some embodiments of the present invention, Figure 3 As shown, the heat exchange tube 3 is arranged along the length direction of the energy storage material plate 2 (see the attached Figure 3 The zigzag extension in the direction a shown in the figure can increase the contact area between the heat exchange tube 3 and the energy storage material plate 2, thereby increasing the heat exchange area between the heat exchange tube 3 and the energy storage material plate 2, and further improving the heat exchange efficiency between the heat exchange tube 3 and the energy storage material plate 2.

[0060] In a further embodiment of the present invention, referring to the attached Figure 3 As shown, the heat exchange tube 3 includes a plurality of zigzag sections 31 and a plurality of connecting sections 32, and the plurality of zigzag sections 31 and the plurality of connecting sections 32 are alternately arranged in the length direction of the energy storage material plate 2, and two adjacent zigzag sections 31 are connected by the connecting section 32, and each zigzag section 31 includes a first section 311, a second section 312 and a third section 313 connected in sequence, and the first section 311 and the third section 313 are arranged in the width direction of the energy storage material plate 2 (refer to the attached Figure 4 The second section 312 and the connecting section 32 extend along the length direction of the energy storage material plate 2. The length direction of the connecting section 32 (see the attached Figure 3The two ends of the heat exchange tube 3 (in the direction a shown in the figure) are respectively connected to the first section 311 of one of the two adjacent zigzag sections 31 and the third section 313 of the other one. After the heat exchange medium enters the heat exchange tube 3, it flows into the first section 311, the second section 312 and the third section 313 in sequence, and then flows through the connecting section 32 to the first section 311, the second section 312 and the third section 313 of the next zigzag section 31, and finally flows out of the heat exchange tube 3 from the third section 313 of the last zigzag section 31.

[0061] It can be understood that when the heat exchange medium flows in the first section 311 and the third section 313, heat exchange can be performed with part of the energy storage material plate 2 adjacent to the first section 311 and the third section 313 along the width direction of the energy storage material plate 2; when the heat exchange medium flows in the second section 312 and the connecting section 32, heat exchange can be performed with part of the energy storage material plate 2 adjacent to the second section 312 and the connecting section 32 along the length direction of the energy storage material plate 2, thereby further increasing the heat exchange area between the heat exchange tube 3 and the energy storage material plate 2 and improving the heat exchange efficiency between the heat exchange tube 3 and the energy storage material plate 2.

[0062] In a specific example, see the attached Figure 3 and attached Figure 4 As shown, the heat exchange tube 3 includes seven tortuous sections 31 and six connecting sections 32. The seven tortuous sections 31 and the six connecting sections 32 are alternately arranged in the length direction of the energy storage material plate 2, which can increase the contact area between the heat exchange tube 3 and the energy storage material plate 2, increase the heat exchange area between the heat exchange tube 3 and the energy storage material plate 2, and thus improve the heat exchange efficiency between the heat exchange tube 3 and the energy storage material plate 2.

[0063] In a further embodiment of the present invention, referring to the attached Figure 3 and attached Figure 4 As shown, the spacing between the first section 311 and the third section 313 in the length direction of the energy storage material plate 2 is 18-30 mm. Compared with the prior art, the spacing between the first section 311 and the third section 313 in the length direction of the energy storage material plate 2 is larger, which can reduce the use of the heat exchange tube 3 as much as possible on the basis of ensuring the heat exchange effect, thereby reducing the space occupied by the heat exchange tube 3 in the box body 1, and avoiding the use of a large number of heat exchange tubes 3 to reduce the energy density of the accumulator 100. For example, the spacing between the first section 311 and the third section 313 in the length direction of the energy storage material plate 2 can be 18 mm, 20 mm, 22 mm, 24 mm, 26 mm, 28 mm or 30 mm.

[0064] In some embodiments of the present invention, Figure 3 As shown, the energy storage material plate 2 is along the thickness direction of the energy storage material plate 2 (refer to the attached Figure 3c direction as shown in the figure, the heat exchange tubes 3 are multiple and correspond to the multiple energy storage material plates 2 one by one. Each heat exchange tube 3 exchanges heat with the corresponding energy storage material plate 2, which can increase the contact area between the heat exchange tube 3 and the energy storage material plate 2, improve the heat exchange effect between the heat exchange tube 3 and the energy storage material plate 2, and improve the energy storage density of the accumulator 100. For example, the number of energy storage material plates 2 can be two, four, six, eight or ten, and the heat exchange tubes 3 are two, four, six, eight or ten and correspond to the energy storage material plates 2 one by one. In a specific example, refer to the attached Figure 3 As shown, there are four energy storage material plates 2 spaced apart along the thickness direction of the energy storage material plates 2, and there are four heat exchange tubes 3 corresponding to the four energy storage material plates 2 one by one. The four heat exchange tubes 3 respectively exchange heat with the corresponding four energy storage material plates 2, thereby improving the energy storage density of the accumulator 100.

[0065] Optionally, multiple energy storage material plates 2 arranged in the thickness direction of the energy storage material plate 2 are a group, and at least one group of energy storage material plates 2 is provided in the box body 1. Multiple groups of energy storage material plates 2 are arranged in the thickness direction of the energy storage material plate 2, which can further improve the energy storage density of the energy accumulator 100.

[0066] In a further embodiment of the present invention, referring to the attached Figure 3 and attached Figure 4 As shown, in the thickness direction of the energy storage material plate 2, the distance between two adjacent heat exchange tubes 3 is 9-15 mm. By adjusting the distance between two adjacent heat exchange tubes 3, different energy storage densities can be achieved, thereby meeting different needs of users and improving the user experience. For example, the distance between two adjacent heat exchange tubes 3 in the thickness direction of the energy storage material plate 2 can be 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm or 15 mm.

[0067] In a further embodiment of the present invention, referring to the attached Figure 4 As shown, in the thickness direction of the energy storage material plate 2, two adjacent heat exchange tubes 3 are staggered in the length direction of the energy storage material plate 2, and the arrangement is simple and uniform, which can facilitate the inflow and outflow of the heat exchange medium.

[0068] In a further embodiment of the present invention, some of the heat exchange tubes 3 among the plurality of heat exchange tubes 3 are energy-releasing heat exchange tubes, and some of the heat exchange tubes 3 are energy-storing heat exchange tubes. The energy-releasing heat exchange tubes and the energy-storing heat exchange tubes are alternately arranged in the thickness direction of the energy storage material plate 2, so that the hot medium and the cold medium alternately flow through the energy storage material plate 2 at the same position, thereby realizing that the energy storage material plate 2 heats the cold medium, the ice water changes from liquid to solid, and absorbs heat from the hot medium, the ice water changes from solid to liquid, and the phase change of the ice water in the energy storage material plate 2 is completed, thereby ensuring the reliability of the energy storage material plate 2. In a specific example, refer to the attached Figure 4As shown, there are eight heat exchange tubes 3 spaced apart along the thickness direction of the energy storage material plate 2, four of the eight heat exchange tubes 3 are energy release heat exchange tubes, and the other four are energy storage heat exchange tubes, and the energy release heat exchange tubes and the energy storage heat exchange tubes are alternately arranged in the thickness direction of the energy storage material plate 2.

[0069] In a further embodiment of the present invention, a plurality of energy-releasing heat exchange tubes are connected in parallel, and a plurality of energy-storing heat exchange tubes are connected in parallel. The plurality of parallel energy-releasing heat exchange tubes form a plurality of cold medium flow channels, which can divide the cold medium into a plurality of parts and enter the plurality of energy-releasing heat exchange tubes respectively. The energy storage material plate 2 heats the cold medium, and the ice water in the energy storage material plate 2 undergoes a phase change from liquid to solid, thereby expanding the path through which the cold medium flows, increasing the heat exchange area between the cold medium and the energy storage material plate 2, and improving the heat exchange efficiency between the cold medium and the energy storage material plate 2; the plurality of parallel energy-storing heat exchange tubes form a plurality of hot medium flow channels, which can divide the hot medium into a plurality of parts and enter the plurality of energy-storing heat exchange tubes respectively. The energy storage material plate 2 absorbs the heat of the hot medium, and the ice water in the energy storage material plate 2 undergoes a phase change from solid to liquid, thereby expanding the path through which the hot medium flows, increasing the heat exchange area between the hot medium and the energy storage material plate 2, and improving the heat exchange efficiency between the hot medium and the energy storage material plate 2.

[0070] In a further embodiment of the present invention, referring to the attached Figure 5 , Attachment Figure 6 and attached Figure 7 As shown, the accumulator 100 also includes a first current collecting member 4 and a second current collecting member 5, which are arranged outside the box body 1, and the first current collecting member 4 has a first current collecting channel, a second current collecting channel, a first port 41 and a second port 42, the first port 41 is connected to the first current collecting channel, and the second port 42 is connected to the second current collecting channel, and the second current collecting member 5 has a third current collecting channel, a fourth current collecting channel, a third port 51 and a fourth port 52, the third port 51 is connected to the third current collecting channel, and the fourth port 52 is connected to the fourth current collecting channel, and the length direction of the energy release heat exchange tube (refer to the attached Figure 3 The two ends of the energy storage heat exchange tube (in the direction a shown in the figure) are connected to the first collecting channel and the third collecting channel respectively, and the length direction of the energy storage heat exchange tube (refer to the attached Figure 3 The two ends in the direction a) are connected to the second collecting channel and the fourth collecting channel respectively.

[0071] It can be understood that the flow direction of the cold medium in the energy-releasing heat exchange tube is opposite to the flow direction of the hot medium in the energy-storing heat exchange tube. The hot medium and the cold medium flow through the energy storage material plate 2 alternately in sequence. When the cold medium passes through, the energy storage material plate 2 heats the cold medium, and the ice water in the energy storage material plate 2 undergoes a phase change from liquid to solid. When the hot medium passes through, the energy storage material plate 2 absorbs the heat of the hot medium, and the ice water in the energy storage material plate 2 undergoes a phase change from solid to liquid, thereby completing the heat transfer between the hot medium and the cold medium.

[0072] Specifically, the cold medium flows into the first collecting component 4 from the first port 41, and then flows to multiple energy release heat exchange tubes through the first collecting channel. The energy storage material plate 2 heats the cold medium, and the ice water in the energy storage material plate 2 undergoes a phase change from liquid to solid. The cold medium in the multiple energy release heat exchange tubes becomes a hot medium and then converges in the third collecting channel and flows out of the second collecting component 5 through the third port 51; the hot medium flows into the first collecting component 4 from the second port 42, and then flows to multiple energy storage heat exchange tubes through the second collecting channel. The energy storage material plate 2 absorbs the heat of the hot medium, and the ice water in the energy storage material plate 2 undergoes a phase change from solid to liquid. The hot medium in the multiple energy storage heat exchange tubes converges in the fourth collecting channel after the temperature is reduced to a certain extent, and flows out of the second collecting component 5 through the fourth port 52.

[0073] In a further embodiment of the present invention, referring to the attached Figure 5 As shown, the first current collecting member 4 and the second current collecting member 5 are both located on one side of the box body 1 along the width direction of the energy storage material plate 2 and are respectively located at both ends of the box body 1 along the length direction of the energy storage material plate 2; or, refer to the attached Figure 6 As shown, the first current collecting member 4 and the second current collecting member 5 are respectively located on both sides of the box body 1 along the length direction of the energy storage material plate 2 and are both located at the same end of the box body 1 along the width direction of the energy storage material plate 2; or, refer to the attached Figure 7 As shown, one of the first current collector 4 and the second current collector 5 is located at one side of the box body 1 along the width direction of the energy storage material plate 2, and the other of the first current collector 4 and the second current collector 5 is located at one side of the box body 1 along the length direction of the energy storage material plate 2, and the first current collector 4 and the second current collector 5 are both located at the same end of the box body 1 along the width direction of the energy storage material plate 2, and are both located at both ends of the box body 1 along the length direction of the energy storage material plate 2. By changing the positions of the first current collector 4 and the second current collector 5, it can be applied to different scenarios according to needs, improve the adaptability of the accumulator 100, and reduce the development cost of the accumulator 100.

[0074] It is understandable that, referring to the Figure 5 As shown, the first current collecting member 4 and the second current collecting member 5 may be located at one side of the box body 1 along the width direction of the energy storage material plate 2 and are respectively located at both ends of the box body 1 along the length direction of the energy storage material plate 2; Figure 6 As shown, the first current collecting member 4 and the second current collecting member 5 may be respectively located on both sides of the box body 1 along the length direction of the energy storage material plate 2 and both located at the same end of the box body 1 along the width direction of the energy storage material plate 2; refer to the attached Figure 7As shown, the first current collecting component 4 may be located on one side of the box body 1 along the width direction of the energy storage material plate 2, the second current collecting component 5 may be located on one side of the box body 1 along the length direction of the energy storage material plate 2, and the first current collecting component 4 and the second current collecting component 5 may be located at the same end of the box body 1 along the width direction of the energy storage material plate 2, and may be located at both ends of the box body 1 along the length direction of the energy storage material plate 2; the second current collecting component 5 may be located on one side of the box body 1 along the width direction of the energy storage material plate 2, the first current collecting component 4 may be located on one side of the box body 1 along the length direction of the energy storage material plate 2, and the first current collecting component 4 and the second current collecting component 5 may be located at the same end of the box body 1 along the width direction of the energy storage material plate 2, and may be located at both ends of the box body 1 along the length direction of the energy storage material plate 2.

[0075] In some embodiments of the present invention, the heat exchange tube 3 is a copper tube, which is light in weight, has good thermal conductivity, high structural strength, good corrosion resistance, simple molding process, and high reliability. It should be noted that in the prior art, a tube-fin heat exchanger is usually provided in the accumulator, and the tube-fin heat exchanger has copper tubes and aluminum fins. The two different metals are prone to electrochemical corrosion when immersed in liquid, and the reliability is poor. However, the present application only uses a single metal heat exchange tube 3 without a fin structure. The arrangement of the energy storage material plate 2 can ensure the heat exchange performance while avoiding corrosion as much as possible, thereby improving the reliability and stability of the accumulator 100 and extending the service life of the accumulator 100.

[0076] Reference below Figures 1 to 12 The accumulator 100 according to two specific embodiments of the present invention is described. It is worth noting that the following description is merely exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0077] Embodiment 1

[0078] Specifically, Figures 1 to 12 As shown, the accumulator 100 includes: a box body 1, an energy storage material plate 2, a heat exchange tube 3, a first current collecting member 4 and a second current collecting member 5.

[0079] Furthermore, the energy storage material plate 2 is arranged in the box body 1, and the energy storage material plate 2 is formed by mixing carbon material and ice water. The ice water includes a mixture of two or more of water, hydrated salt, thermal conductor, thickener and cross-linking agent. It can be understood that the carbon material has a microporous structure, which can shape the ice water to ensure that the energy storage material plate 2 will not be deformed regardless of whether the ice water is in a melted state or a solidified state. Compared with the ice slurry used in the prior art, the stability and reliability are better, the packaging is more convenient, and the uniformity and thermal conductivity can be improved to a certain extent.

[0080] Furthermore, the energy storage material plates 2 are eight energy storage material plates spaced apart in the thickness direction of the energy storage material plates 2, each energy storage material plate 2 has a size of 300 mm×300 mm×11 mm, the total volume of the eight energy storage material plates 2 is 300 mm×300 mm×88 mm, the thermal conductivity of each energy storage material plate 2 is 4.8 W / m·K, the latent heat of phase change is 310 kJ / kg, and the density is 1.03 g / cm 3 The heat exchange tube 3 is a φ5×0.5mm copper tube. The heat exchange tube 3 is embedded in the energy storage material plate 2 and there are eight of them corresponding to the eight energy storage material plates 2. In the thickness direction of the energy storage material plate 2, the distance between two adjacent heat exchange tubes 3 is 11mm and two adjacent heat exchangers 65 are staggered in the length direction of the energy storage material plate 2.

[0081] Furthermore, the heat exchange tube 3 extends in a zigzag manner along the length direction of the energy storage material plate 2 and includes seven zigzag sections 31 and six connecting sections 32. The seven zigzag sections 31 and the six connecting sections 32 are alternately arranged in the length direction of the energy storage material plate 2. Two adjacent zigzag sections 31 are connected by the connecting section 32. Each zigzag section 31 includes a first section 311, a second section 312 and a third section 313 connected in sequence. The first section 311 and the third section 313 extend in the width direction of the energy storage material plate 2, and the first section 311 and the third section 313 are arranged in the length direction of the energy storage material plate 2. The spacing is 22 mm, the second section 312 and the connecting section 32 extend along the length direction of the energy storage material plate 2, and the two ends of the connecting section 32 in the length direction are respectively connected to the first section 311 of one of the two adjacent zigzag sections 31 and the third section 313 of the other. After the heat exchange medium enters the heat exchange tube 3, it flows into the first section 311, the second section 312 and the third section 313 in sequence, and then flows through the connecting section 32 to the first section 311, the second section 312 and the third section 313 of the next zigzag section 31, and finally flows out of the heat exchange tube 3 from the third section 313 of the last zigzag section 31.

[0082] In addition, the first current collecting part 4 and the second current collecting part 5 are both located on one side of the box body 1 along the width direction of the energy storage material plate 2 and are respectively located at the two ends of the box body 1 along the length direction of the energy storage material plate 2. The first current collecting part 4 has a first current collecting channel, a second current collecting channel, a first port 41 and a second port 42. The first port 41 is connected to the first current collecting channel, and the second port 42 is connected to the second current collecting channel. The second current collecting part 5 has a third current collecting channel, a fourth current collecting channel, a third port 51 and a fourth port 52. The third port 51 is connected to the third current collecting channel, and the fourth port 52 is connected to the fourth current collecting channel. The two ends of the energy release heat exchange tube in the length direction are respectively connected to the first current collecting channel and the third current collecting channel, and the two ends of the energy storage heat exchange tube in the length direction are respectively connected to the second current collecting channel and the fourth current collecting channel.

[0083] In addition, four of the eight heat exchange tubes 3 are energy-releasing heat exchange tubes, and four of the eight heat exchange tubes 3 are energy-storing heat exchange tubes. The four energy-releasing heat exchange tubes are connected in parallel, and the four energy-storing heat exchange tubes are connected in parallel. The energy-releasing heat exchange tubes and the energy-storing heat exchange tubes are alternately arranged in the thickness direction of the energy storage material plate 2.

[0084] It can be understood that the cold medium flows into the first collecting component 4 from the first port 41, and then flows to the four energy-releasing heat exchange tubes through the first collecting channel. The energy storage material plate 2 heats the cold medium, and the ice water in the energy storage material plate 2 undergoes a phase change from liquid to solid. The cold medium in the four energy-releasing heat exchange tubes becomes a hot medium and then converges in the third collecting channel, and flows out of the second collecting component 5 through the third port 51; the hot medium flows into the first collecting component 4 from the second port 42, and then flows to the four energy storage heat exchange tubes through the second collecting channel. The energy storage material plate 2 absorbs the heat of the hot medium, and the ice water in the energy storage material plate 2 undergoes a phase change from solid to liquid. The hot medium in the four energy storage heat exchange tubes converges in the fourth collecting channel after the temperature is reduced to a certain extent, and flows out of the second collecting component 5 through the fourth port 52.

[0085] like Fig.10 and Fig.11 As shown, a -10°C ethylene glycol aqueous solution is passed through the energy-releasing heat exchange tube at a flow rate of 80 L / h and a starting temperature of 20°C. The total time for cold storage is 3.3 hours until the temperature difference at the third port 51 is less than 0.5°C. The -10°C ethylene glycol solution is stopped from being passed through the energy-releasing heat exchange tube, and a 20°C ethylene glycol aqueous solution is passed through the energy-reservoir heat exchange tube at an average flow rate of 110 L / h. The temperature difference at the fourth port 52 is less than 1°C. The total cold capacity actually released is 0.71 kWh. At this time, the energy storage density of the accumulator 100 is 90 kWh / m 3 .

[0086] Embodiment 2

[0087] The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked the same, and the only difference is that there are twenty energy storage material plates 2 spaced apart along the thickness direction of the energy storage material plates 2, the size of each energy storage material plate 2 is 336 mm × 520 mm × 12 mm, the total volume of the twenty energy storage material plates 2 is 41.9 L, there are twenty heat exchange tubes 3 corresponding one to one to the twenty energy storage material plates 2, the distance between two adjacent heat exchange tubes 3 is 12 mm, ten of the twenty heat exchange tubes 3 are energy release heat exchange tubes, and ten of the heat exchange tubes 3 are energy storage heat exchange tubes, ten energy release heat exchange tubes are connected in parallel, and ten energy storage heat exchange tubes are connected in parallel, and the energy release heat exchange tubes and the energy storage heat exchange tubes are alternately arranged in the thickness direction of the energy storage material plates 2.

[0088] like Fig.12As shown, the cold storage uses refrigerant to store cold, and the evaporation temperature of the refrigerant is -5°C until the accumulator 100 is completely cold, and the cold storage time is 1.5 hours; stop introducing the refrigerant into the energy release heat exchange tube, and introduce 10°C ethylene glycol aqueous solution into the energy storage heat exchange tube, with an average flow rate of 900L / h, and cool until the temperature of the fourth port 52 exceeds 8°C, and the cooling time is 1 hour. The actual total cooling capacity released is 3.68kWh. At this time, the energy storage density of the accumulator 100 is 88kWh / m 3 .

[0089] The present invention further provides an air conditioner having the energy storage device 100 according to the above embodiment.

[0090] When the air conditioner is a mobile air conditioner 200, refer to the attached Figure 8 As shown, the mobile air conditioner 200 includes a cold charging station 201 and a mobile machine 202. The cold charging station 201 is composed of a compressor 61, a wind wheel 62, a condenser 63, an electric control and other main components, which can charge cold for the accumulator 100 in the mobile machine 202. The mobile machine 202 is provided with a heat exchanger 65, a wind wheel 62, a water pump 66, an accumulator 100 and other main components. A refrigerant circulates inside the mobile machine 202 to release cold. The cold charging station 201 and the mobile machine 202 are both provided with a medium quick-connect inlet and outlet. The cold charging station 201 charges the accumulator 100 in the mobile machine 202 in advance, and the cold stored in advance can be released in the peak cold use area, so as to realize the mobility of the air conditioner and meet the refrigeration needs of scene changes. Optionally, the refrigerant is an ethylene glycol aqueous solution or a glycerol aqueous solution.

[0091] It is understandable that, referring to the Figure 8 As shown, when the mobile air conditioner 200 is in the cold charging state, the cold charging station 201 is connected to the mobile machine 202, and the high-temperature and high-pressure refrigerant flowing out of the compressor 61 first flows to the condenser 63, and after condensation and heat dissipation, flows into the energy release heat exchange pipe of the accumulator 100 through the medium quick-connect inlet and outlet, and the refrigerant cools the energy storage material plate 2 to a certain extent. The refrigerant with a certain temperature rise flows back to the compressor 61 through the medium quick-connect inlet and outlet, and finally the ice water in the energy storage material plate 2 undergoes a phase change from liquid to solid; at the mobile air conditioner 200 When in the cold state, the cold charging station 201 and the mobile machine 202 do not need to be connected. Driven by the water pump 66, the refrigerant in the heat exchanger 65 flows into the energy storage heat exchange tube of the accumulator 100, and the energy storage material plate 2 absorbs the heat of the refrigerant. The refrigerant flows out of the accumulator 100 after reducing its temperature to a certain extent, and then enters the heat exchanger 65. Driven by the wind wheel 62, the refrigerant exchanges heat with the hot air in the air, absorbs the heat in the air, and cools the air to a certain extent. Finally, the ice water in the energy storage material plate 2 undergoes a phase change from solid to liquid.

[0092] When the air conditioner is a ceiling air conditioner 300, refer to the attached Fig. 9As shown, the ceiling air conditioner 300 is provided with main components such as a compressor 61, a fan 62, a condenser 63, a motor 64, a heat exchanger 65, a water pump 66 and an accumulator 100. A refrigerant circulates inside the ceiling air conditioner 300 for cooling. After storing cold for a specific period of time, a large amount of cold can be released when needed to meet the needs of short-term large cold in special scenarios. For example, in the field of building air conditioners, the accumulator 100 can store cold during the low electricity price period and release cold during the peak electricity price period, thereby reducing the cooling electricity cost of the air conditioner.

[0093] It is understandable that, referring to the Fig. 9 As shown, when the ceiling air conditioner 300 needs a large cooling capacity in a short time, the compressor 61 and the accumulator 100 are always connected, and the high-temperature and high-pressure refrigerant flowing out of the compressor 61 first flows to the condenser 63, and flows into the energy release heat exchange tube of the accumulator 100 after condensation and heat dissipation. The refrigerant cools the energy storage material plate 2 to a certain extent, and the refrigerant with a certain temperature increases flows back to the compressor 61. Finally, the ice water in the energy storage material plate 2 undergoes a phase change from liquid to solid; driven by the water pump 66, the coolant in the heat exchanger 65 flows into the energy storage heat exchange tube of the accumulator 100, and the energy storage material plate 2 absorbs the heat of the coolant. After the temperature is reduced to a certain extent, the coolant flows out of the accumulator 100, and then enters the heat exchanger 65. Driven by the wind wheel 65, it exchanges heat with the hot air in the air, absorbs the heat in the air, and cools the air to a certain extent. Finally, the ice water in the energy storage material plate 2 undergoes a phase change from solid to liquid.

[0094] According to the air conditioner of the embodiment of the present invention, by providing the above-mentioned energy accumulator 100, by providing the energy storage material plate 2 and embedding the heat exchange tube 3 in the energy storage material plate 2, the phase change latent heat can be increased, the thermal conductivity can be increased, and the heat exchange performance can be improved. In addition, the energy storage material plate 2 has a large unit volume phase change energy storage density and can store more cold energy. It can ensure the stability of the energy storage material plate 2 while ensuring good contact between the energy storage material plate 2 and the heat exchange medium.

[0095] Other structures and operations of the accumulator 100 and the air conditioner according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0097] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An accumulator, characterized in that: include: Box; An energy storage material plate, wherein the energy storage material plate is arranged in the box; A heat exchange tube is arranged in the box body and embedded in the energy storage material plate.

2. The accumulator according to claim 1, characterized in that The energy storage material plate is formed by mixing carbon material and ice water, wherein the ice water comprises a mixture of two or more of water, hydrated salt, a heat conductor, a thickener and a cross-linking agent.

3. The accumulator according to claim 1, characterized in that The heat exchange tube extends in a zigzag manner along the length direction of the energy storage material plate.

4. The accumulator according to claim 3, characterized in that The heat exchange tube includes a plurality of zigzag sections and a plurality of connecting sections, the plurality of zigzag sections and the plurality of connecting sections are alternately arranged in the length direction of the energy storage material plate, two adjacent zigzag sections are connected by the connecting sections, each of the zigzag sections includes a first section, a second section and a third section connected in sequence, the first section and the third section extend in the width direction of the energy storage material plate, the second section and the connecting section extend in the length direction of the energy storage material plate, and the two ends of the connecting section in the length direction are respectively connected to the first section of one of the two adjacent zigzag sections and the third section of the other one.

5. The accumulator according to claim 4, characterized in that The spacing between the first section and the third section in the length direction of the energy storage material plate is 18-30 mm.

6. The accumulator according to claim 1, characterized in that The energy storage material plates are multiple and spaced apart along the thickness direction of the energy storage material plates, and the heat exchange tubes are multiple and correspond one to one to the multiple energy storage material plates.

7. The accumulator according to claim 6, characterized in that In the thickness direction of the energy storage material plate, the distance between two adjacent heat exchange tubes is 9-15 mm.

8. The accumulator according to claim 6, characterized in that In the thickness direction of the energy storage material plate, two adjacent heat exchange tubes are staggered in the length direction of the energy storage material plate.

9. The accumulator according to claim 6, characterized in that: Some of the plurality of heat exchange tubes are energy-releasing heat exchange tubes, and some are energy-storing heat exchange tubes. The energy-releasing heat exchange tubes and the energy-storing heat exchange tubes are alternately arranged in the thickness direction of the energy storage material plate.

10. The accumulator according to claim 9, characterized in that A plurality of the energy-releasing heat exchange tubes are connected in parallel, and a plurality of the energy-storing heat exchange tubes are connected in parallel.

11. The accumulator according to claim 10, characterized in that Also includes: A first current collecting member and a second current collecting member, the first current collecting member and the second current collecting member are arranged outside the box body, the first current collecting member is provided with a first current collecting channel, a second current collecting channel, a first port and a second port, the first port is connected with the first current collecting channel, the second port is connected with the second current collecting channel, the second current collecting member is provided with a third current collecting channel, a fourth current collecting channel, a third port and a fourth port, the third port is connected with the third current collecting channel, the fourth port is connected with the fourth current collecting channel, the two ends of the energy release heat exchange tube in the length direction are respectively connected with the first current collecting channel and the third current collecting channel, the two ends of the energy storage heat exchange tube in the length direction are respectively connected with the second current collecting channel and the fourth current collecting channel.

12. The accumulator according to claim 11, characterized in that The first current collecting member and the second current collecting member are both located at one side of the box along the width direction of the energy storage material plate and are respectively located at two ends of the box along the length direction of the energy storage material plate; Or, the first current collecting member and the second current collecting member are respectively located at two sides of the box body along the length direction of the energy storage material plate and are both located at the same end of the box body along the width direction of the energy storage material plate; Or, one of the first current collecting member and the second current collecting member is located on one side of the box along the width direction of the energy storage material plate, the other of the first current collecting member and the second current collecting member is located on one side of the box along the length direction of the energy storage material plate, and the first current collecting member and the second current collecting member are both located at the same end of the box along the width direction of the energy storage material plate, and are both located at both ends of the box along the length direction of the energy storage material plate.

13. The accumulator according to claim 1, characterized in that The heat exchange tube is a copper tube.

14. An air conditioner, characterized in that: Comprising an accumulator according to any one of claims 1-13.

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