Manual air energy cold and hot dual-purpose food box

Abstract

The application provides a hand-operated air energy dual-purpose food box, which comprises a main box, a piston assembly, a liquid-gas assembly, and a refrigeration working medium; the main box comprises a base, a storage cavity, a fourth liquid-gas chamber, a third liquid-gas chamber, a second liquid-gas chamber, a first liquid-gas chamber, a piston cavity, and an air exchange channel; the piston assembly comprises a piston cavity sealing cover, a piston rotating cover, and a piston; the liquid-gas assembly comprises a vertical partition plate, a horizontal baffle, and a one-way valve hole plate; the vertical partition plate and the horizontal baffle divide the bottom of the piston cavity into a front air cavity and a rear air cavity; the horizontal baffle is provided with two air exchange one-way valves with opposite air exchange directions, and the two air exchange one-way valves are arranged in the front air cavity and the rear air cavity, respectively; the one-way valve hole plate divides the air exchange channel into an upper channel and a lower channel; the one-way valve hole plate is provided with two double-pass one-way valves with opposite air exchange directions, and the two double-pass one-way valves are arranged in the upper channel and the lower channel, respectively. The application utilizes two kinds of refrigeration working medium to realize the heating or refrigeration effect with a large temperature difference through manual operation.

Description

Technical Field

[0001] This invention relates to a dual-purpose hot and cold food container, and more particularly to a manual air-source dual-purpose hot and cold food container, belonging to the technical field of daily necessities that use air-source heating or cooling. Background Technology

[0002] As living standards improve, people have increasingly higher demands for the quality of various snacks, and many office workers like to carry various foods with them on their commute to satisfy their hunger at any time. Currently, there are many types of snacks on the market; for example, dairy products and chocolates require refrigeration, while pastries need to be kept warm. However, existing snack storage bags or boxes only provide storage and carrying functions and cannot meet the needs for temperature regulation during transport.

[0003] Furthermore, existing refrigeration or heating technologies mainly rely on the principle that substances absorb heat when they vaporize (from liquid to gas) and release heat when they liquefy (from gas to liquid). These technologies are widely used in the field of air conditioning technology, but are rarely used in other everyday, portable devices, and have never been used as a means of temperature regulation for food containers.

[0004] Therefore, the present invention urgently needs to develop a food container that can be used for both hot and cold cooking, so as to realize the first application of manual high-temperature difference cooling and heating in daily necessities. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a manual air-source dual-purpose hot and cold food box that utilizes two refrigerants with different evaporation temperatures to achieve heating or cooling effects with a large temperature difference through manual operation.

[0006] To achieve the above objectives, the present invention provides a manual air-source dual-purpose hot and cold food box, characterized in that it includes a main box, a piston assembly, a liquid-gas assembly, and a refrigerant.

[0007] The main box includes a base, a storage cavity mounted on the base, a fourth liquid-gas chamber, a third liquid-gas chamber, a second liquid-gas chamber, and a first liquid-gas chamber that surround the storage cavity from the inside out, two piston chambers mounted on the left and right sides of the first liquid-gas chamber, and two ventilation channels that connect the left and right sides of the base and the bottom of the corresponding piston chambers.

[0008] The piston assembly includes a piston chamber sealing cap installed on the top surface of each piston chamber, a piston cap installed on the bottom surface of each piston chamber, and a piston placed inside each piston chamber; the top surfaces of the two pistons are respectively connected to the bottom end of a piston connecting rod, the top ends of the two piston connecting rods protrude through the corresponding piston chamber sealing caps, and are connected by piston handles.

[0009] The liquid-gas assembly comprises a vertical partition plate installed on the inner bottom surface of each piston cap, a horizontal baffle plate installed on the top surface of the vertical partition plate, and a one-way valve hole plate installed in each gas exchange channel.

[0010] The bottom of each piston cavity is divided into a front gas cavity and a rear gas cavity by the vertical partition plate and the horizontal baffle plate, the horizontal baffle plate is provided with two gas exchange one-way valves with opposite up and down gas exchange directions, and the two gas exchange one-way valves are located in the front gas cavity and the rear gas cavity, respectively; each gas exchange channel is divided into an upper channel and a lower channel by a one-way valve hole plate, the one-way valve hole plate is provided with two double-pass one-way valves with opposite up and down gas exchange directions, and the two double-pass one-way valves are located in the upper channel and the lower channel, respectively.

[0011] The left rear gas cavity is communicated with the first liquid-gas chamber through the left upper channel, and the double-pass one-way valve in the left upper channel is upward gas exchange; the left front gas cavity is communicated with the third liquid-gas chamber through the left lower channel, and the double-pass one-way valve in the left lower channel is downward gas exchange; the right rear gas cavity is communicated with the second liquid-gas chamber through the right upper channel, and the double-pass one-way valve in the right upper channel is upward gas exchange; and the right front gas cavity is communicated with the fourth liquid-gas chamber through the right lower channel, and the double-pass one-way valve in the right lower channel is downward gas exchange.

[0012] The refrigeration working medium comprises a refrigerant with a lower evaporation temperature and a refrigerant with a higher evaporation temperature.

[0013] When the food box is used for heating, the refrigerant with a lower evaporation temperature is placed in the left piston cavity, the refrigerant with a higher evaporation temperature is placed in the right piston cavity, and the gas exchange one-way valves in the left and right front gas cavities are downward gas exchange, and the gas exchange one-way valves in the left and right rear gas cavities are upward gas exchange.

[0014] When the food box is used for freezing, the refrigerant with a higher evaporation temperature is placed in the left piston cavity, the refrigerant with a lower evaporation temperature is placed in the right piston cavity, and the gas exchange one-way valves in the left and right front gas cavities are upward gas exchange, and the gas exchange one-way valves in the left and right rear gas cavities are downward gas exchange.

[0015] According to the above technical solution, the structure principle and the flow direction of the refrigeration working medium of the present application are as follows:

[0016] When the piston moves upward, the refrigeration working medium in the first liquid gas chamber and the third liquid gas chamber enters the left rear air cavity and the right rear air cavity through the left upper channel and the right upper channel respectively, and then enters the left piston cavity and the right piston cavity through the air exchange one-way valve in the left rear air cavity and the right rear air cavity respectively; when the piston moves downward, the refrigeration working medium in the left piston cavity and the right piston cavity enters the left lower channel and the right lower channel through the air exchange one-way valve in the left front air cavity and the right front air cavity respectively, and then enters the third liquid gas chamber and the fourth liquid gas chamber through the left lower channel and the right lower channel respectively. Moreover, when the air pressure in the third liquid gas chamber reaches the opening air pressure of the double-way one-way valve in the left lower channel, the refrigeration working medium is injected into the left upper channel through the double-way one-way valve and flows back to the first liquid gas chamber; at the same time, when the air pressure in the fourth liquid gas chamber reaches the opening air pressure of the double-way one-way valve in the right lower channel, the refrigeration working medium is injected into the right upper channel through the double-way one-way valve and flows back to the second liquid gas chamber.

[0017] When the piston moves upward, the refrigeration working medium in the second liquid gas chamber and the fourth liquid gas chamber enters the left front air cavity and the right front air cavity through the left lower channel and the right lower channel respectively, and then enters the left piston cavity and the right piston cavity through the air exchange one-way valve in the left front air cavity and the right front air cavity respectively; when the piston moves downward, the refrigeration working medium in the left piston cavity and the right piston cavity enters the left upper channel and the right upper channel through the air exchange one-way valve in the left rear air cavity and the right rear air cavity respectively, and then enters the first liquid gas chamber and the second liquid gas chamber through the left upper channel and the right upper channel respectively. Moreover, when the air pressure in the first liquid gas chamber reaches the opening air pressure of the double-way one-way valve in the left upper channel, the refrigeration working medium is injected into the left lower channel through the double-way one-way valve and flows back to the third liquid gas chamber; at the same time, when the air pressure in the second liquid gas chamber reaches the opening air pressure of the double-way one-way valve in the right upper channel, the refrigeration working medium is injected into the right lower channel through the double-way one-way valve and flows back to the fourth liquid gas chamber.

[0018] Further, the top surface of the storage cavity is provided with a storage cavity sealing cover, and the storage cavity sealing cover comprises a cover body and a handle connected to the top surface of the cover body; the cover body is provided with an inner-outer double-layer structure with a middle vacuum interlayer.

[0019] Further, the storage cavity and the piston cavity are cylindrical, and the fourth liquid gas chamber, the third liquid gas chamber, the second liquid gas chamber and the first liquid gas chamber are circular ring columns with the same central axis as the storage cavity.

[0020] Further, the connection between the piston rotating cover and the bottom surface of the piston cavity is provided with a sealing rubber ring.

[0021] Further, the middle part of the piston connecting rod is sleeved with a circular truncated cone and located below the piston cavity sealing cover, so as to support the bottom surface of the piston cavity sealing cover when the piston cavity sealing cover is loosened.

[0022] Further, the lowest opening air pressure of the double-way one-way valve is 2 standard atmospheres. When the application is used to heat food, only two double-way one-way valves in the left upper channel and the right upper channel are opened to work; when the application is used to freeze food, only two double-way one-way valves in the left lower channel and the right lower channel are opened to work.

[0023] Further, the outer wall of the first liquid-gas chamber is provided with heat transfer fins perpendicular thereto.

[0024] Further, the metal thin wall between the third liquid-gas chamber and the second liquid-gas chamber is provided with heat transfer fins perpendicular thereto.

[0025] Further, the outer wall of the fourth liquid-gas chamber and the second liquid-gas chamber is an inner-outer double-layer structure with an intermediate vacuum interlayer.

[0026] Further, the refrigerant with a lower evaporation temperature is ethyl ether, and the refrigerant with a higher evaporation temperature is ethanol.

[0027] In summary, the application uses two refrigerants with different evaporation temperatures, and the handle of the piston is pushed to compress the refrigerants, so that the two refrigerants can circulate in two mutually sealed spaces at the same time, absorb air heat from the outside and transfer the heat to food or release the heat of the food to the outside, thereby realizing the functions of hot rice and hot water or frozen food.

[0028] When the application is used to heat food, the two refrigerants enter the third liquid-gas chamber from the first liquid-gas chamber and the fourth liquid-gas chamber from the second liquid-gas chamber at the same time, the refrigerant with a lower evaporation temperature absorbs heat in the first liquid-gas chamber (i.e., the evaporation heat absorption chamber) and transfers the heat to the second liquid-gas chamber (i.e., the evaporation heat absorption chamber) in the third liquid-gas chamber (i.e., the condensation heat release chamber), and the heat exchange is completed through the metal wall and the heat transfer fins between the second liquid-gas chamber and the third liquid-gas chamber with the function of an exchanger. The refrigerant with a higher evaporation temperature absorbs heat in the second liquid-gas chamber (i.e., the evaporation heat absorption chamber) and releases heat in the fourth liquid-gas chamber (i.e., the condensation heat release chamber), thereby heating the food in the storage cavity and completing the heat conversion between the outside air and the food. When the air pressure in the third liquid-gas chamber and the fourth liquid-gas chamber exceeds the air plug counterforce of the double-way one-way valve to the first liquid-gas chamber and the second liquid-gas chamber, respectively, the two refrigerants are injected back to the first liquid-gas chamber and the second liquid-gas chamber, respectively, and vaporized to absorb heat, thereby completing the heating of the food in the storage cavity.

[0029] When the application is used for frozen food, the refrigerant with lower evaporation temperature absorbs the heat of the food in the storage cavity in the fourth liquid-gas chamber (i.e. the evaporation heat absorption chamber), and is transferred to the third liquid-gas chamber (i.e. the evaporation heat absorption chamber) through the function of the exchanger in the second liquid-gas chamber (i.e. the condensation heat release chamber), the refrigerant with higher evaporation temperature absorbs heat in the third liquid-gas chamber (i.e. the evaporation heat absorption chamber), and releases heat energy in the first liquid-gas chamber (i.e. the condensation heat release chamber), so as to complete the heat energy conversion. When the gas pressure of the first liquid-gas chamber and the second liquid-gas chamber exceeds the gas plug counter thrust of the double-way one-way valve leading to the third liquid-gas chamber and the fourth liquid-gas chamber respectively, the two kinds of refrigeration working medium are respectively injected back to the third liquid-gas chamber and the fourth liquid-gas chamber, and condensation heat is released, so as to complete the refrigeration of the food in the storage cavity.

[0030] Compared with the prior art, the technical advantages of the application are that:

[0031] 1. The application can realize food heating or refrigeration by manually operating the refrigeration working medium circulation, which is simple and labor-saving.

[0032] 2. The application adopts two different refrigeration working mediums with different evaporation temperatures to work simultaneously, which can realize refrigeration or heating effect with large temperature difference, which is convenient and efficient.

[0033] 3. The refrigeration or heating function of the application does not use electric control elements and does not need power supply, which is safe, energy-saving and environmentally friendly, and can be carried anywhere.

[0034] 4. The refrigeration or heating function of the application can be switched by rotating the position of the piston cap and exchanging the injection position of the refrigeration working medium, which is convenient and can meet different use requirements.

[0035] 5. The application can not only refrigerate or heat the food according to the preservation needs of different foods, but also heat or refrigerate the remaining food in the food box, so as to avoid eating cold or overcooked food, and can also refrigerate and preserve the remaining food in the food box, so as to prevent food from deteriorating and wasting. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0037] Figure 1 It is a structural schematic diagram of the application;

[0038] Figure 2 It is a structural schematic diagram of the main box cover in the application;

[0039] Figure 3 is a structure plan view of the main box in the present application;

[0040] Figure 4 is a partial sectional view of the present application Figure 3 ;

[0041] Figure 5 is a sectional view of A-A direction in the present application Figure 3 ;

[0042] Figure 6 is a sectional view of B-B direction in the present application Figure 3 ;

[0043] Figure 7 is a sectional view of C-C direction in the present application Figure 3 ;

[0044] Figure 8 is a front view of the piston screw cap in the present application ;

[0045] Figure 9 is a structure plan view of the present application Figure 7 ;

[0046] Figure 10 is a sectional view of D-D direction in the present application Figure 8 ;

[0047] In the figure: 1, storage cavity sealing cover, 11, cover body, 12, vacuum interlayer, 13, handle, 2, main box, 21, storage cavity, 22, fourth liquid gas chamber, 23, third liquid gas chamber, 24, second liquid gas chamber, 25, first liquid gas chamber, 26, piston cavity, 27, gas exchange channel, 28, base, 3, piston, 4, piston handle, 5, piston connecting rod, 6, piston cavity sealing cover, 7, piston screw cap, 71, horizontal baffle, 72, vertical partition, 73, plug, 74, spring, 75, gas port, 8, gas exchange one-way valve, 9, double-way one-way valve, 91, one-way valve hole plate, 92, valve port. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0049] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] As shown in Figure 1 , the present application comprises a main box 2, a piston assembly, a liquid-gas assembly, and a refrigerant, which are specifically introduced as follows.

[0051] The main box 2 is made of metal material, comprising a base 28, a storage cavity 21, a fourth liquid-gas chamber 22, a third liquid-gas chamber 23, a second liquid-gas chamber 24, a first liquid-gas chamber 25, two piston cavities 26, and two gas exchange channels 27.

[0052] As shown in Figure 1 , Figure 3 , Figure 4 , the main box 2 is surrounded by a vertical wall to form multiple layers of space, specifically, the base 28 is connected with a top-open storage cavity 21, the outer periphery of the storage cavity 21 is sequentially surrounded from the inside to the outside by the fourth liquid-gas chamber 22, the third liquid-gas chamber 23, the second liquid-gas chamber 24 and the first liquid-gas chamber 25; one piston cavity 26 with open top and bottom is arranged on the left and right sides of the first liquid-gas chamber 25; the base 28 is connected to the bottom of the corresponding piston cavity 26 through a gas exchange channel 27 on the left and right sides, and the two gas exchange channels 27 are respectively connected to the bottom of the fourth liquid-gas chamber 22, the third liquid-gas chamber 23, the second liquid-gas chamber 24 and the first liquid-gas chamber 25.

[0053] In specific implementation, the storage cavity 21 is cylindrical, the fourth liquid-gas chamber 22, the third liquid-gas chamber 23, the second liquid-gas chamber 24 and the first liquid-gas chamber 25 are circular cylindrical with the same central axis as the storage cavity, and the piston cavity 26 is cylindrical.

[0054] It should be noted that the metal outer wall of the first liquid-gas chamber 25 is in full contact with the outside environment, and heat transfer fins perpendicular to it are arranged on the metal outer wall. By increasing the heat transfer area of ​​the outer wall, sufficient heat exchange between the first liquid-gas chamber 25 and the outside environment is achieved. The metal outer walls of the fourth liquid-gas chamber 22 and the second liquid-gas chamber 24 have a double-layer structure with a vacuum in between, thus achieving heat insulation. The second liquid-gas chamber 24 and the third liquid-gas chamber 23 are separated only by a thin metal wall, and the thin metal wall has perpendicular heat transfer fins arranged horizontally on it, so that the two liquid-gas chambers and the thin metal wall form a heat exchanger, thereby realizing heat exchange between the two liquid-gas chambers.

[0055] like Figure 2 As shown, in other embodiments, the top opening of the storage cavity 21 is fitted with a sealing cover 1 to facilitate the storage of food within the sealed cavity. The sealing cover 1 includes a cover body 11 and a handle 13 mounted on the top surface of the cover body 11. The cover body 11 has a double-layer structure with an inner and outer layer, and a vacuum interlayer 12 in between. In specific implementations, the sealing cover 1 is made of plastic and has heat insulation properties; the handle 13 is an inverted cone shape, which is easy to grip.

[0056] like Figure 1 As shown, the piston assembly includes two pistons 3, two piston rods 5, a piston handle 4, two piston chamber sealing caps 6, and two piston screw caps 7. Each piston chamber 26 has a piston chamber sealing cap 6 installed on its top open surface and a piston screw cap 7 installed on its bottom open surface, with a piston 3 placed inside. The top surface of each piston 3 is connected to the bottom end of a piston rod 5. A frustum is fitted onto the middle part of each of the two piston rods 5 and is located below the piston chamber sealing cap 6 to support its bottom surface when the piston chamber sealing cap 6 is loosened. The top ends of the two piston rods 5 pass through the corresponding piston chamber sealing cap 6 and are respectively connected to the two ends of the piston handle 4.

[0057] The piston chamber sealing cap 6 and piston screw cap 7 are used to seal the refrigerant in the main box 2 to prevent leakage. When the invention is not in use, the piston chamber sealing cap 6 needs to be tightened onto the top opening of the corresponding piston chamber 26; when the invention is in operation, the piston chamber sealing cap 6 needs to be loosened so that it hangs on the round platform of the corresponding piston connecting rod 5 to ensure air circulation in the corresponding piston chamber 26. In addition, before the invention is in operation, the piston screw cap 7 needs to be unscrewed to facilitate the user to add refrigerant into the piston chamber 26, and a sealing rubber ring is provided at the connection between the piston screw cap 7 and the bottom opening of the piston chamber 26. The piston 3, piston connecting rod 5 and piston handle 4 are used to manually compress the air in the piston chamber 26. Since the two pistons 3 are connected by the gantry-type piston connecting rod 5 above the main box 2, the user can push the two pistons 3 up and down simultaneously by holding the piston connecting rod 5, so that work is done in the corresponding piston chamber 26. The operation is simple and convenient.

[0058] In practical implementation, the cross-sectional area of ​​a single piston 3 is 6.8 cm², and the maximum output of gas compression is 2.5 standard atmospheres, or 2.5 × 10⁵ Pa. Therefore, the maximum thrust required by piston 3 is 2 × 2.5 × 10⁵ Pa × 6.8 cm² × 10⁻⁴ = 340 N. The actual thrust of piston 3 can be input as needed. If the invention is only used to heat food or cool food, the input thrust can be less than 340 N, which is something that an ordinary adult can easily accomplish. Therefore, it achieves a labor-saving, convenient, and efficient use effect.

[0059] The liquid-gas assembly includes a vertical baffle 72 installed on the bottom surface of each piston cap 7, a horizontal baffle 71 installed on the top surface of the vertical baffle 72, and a one-way valve orifice plate 91 installed in each ventilation channel 27, as detailed below.

[0060] like Figure 8 , Figure 9 As shown, a vertical baffle 72 is installed on the bottom surface of each piston cap 7, and a horizontal baffle 71 is installed on the top surface of the vertical baffle 72, thereby dividing the bottom of the corresponding piston chamber 26 into a front air chamber and a rear air chamber; two one-way valves 8 are installed in each horizontal baffle 71, and the two one-way valves 8 are located on the front and rear sides of the corresponding vertical baffle 72, that is, in the front air chamber and the rear air chamber respectively; and the two one-way valves 8 have opposite air passage directions, one one-way valve 8 passes upward and the other one-way valve 8 passes downward.

[0061] In specific implementation, the two vertical partitions 72 are respectively located on the transverse central axis of the main box 2, making the front and rear air chambers symmetrical. When the invention is used for heating, downward-flowing one-way valves 8 are installed in the left and right front air chambers, and upward-flowing one-way valves 8 are installed in the left and right rear air chambers. When the invention is used for cooling, the two piston caps 7 are rotated 180° to swap the positions of the two one-way valves 8 in the same piston chamber 26, that is, upward-flowing one-way valves 8 are installed in the left and right front air chambers, and downward-flowing one-way valves 8 are installed in the left and right rear air chambers, thereby adjusting the circulation direction of the refrigerant. Since the two piston caps 7 are threaded to the corresponding piston chamber 26 bottom openings, and sealing rubber rings are installed at the connection points for buffering, rotating the two piston caps 7 180° will not affect the sealing of the corresponding piston chamber 26 bottom openings.

[0062] like Figure 10As shown, the ventilation one-way valve 8 is a common one-way valve, including a valve seat and a cone plug 73 and a spring 74 installed inside the valve seat; the valve seat has a conical head end with a gas port 75 at one end and a flat head end at the other end; the conical head end movably installs a conical plug 73 in shape matching, the bottom surface of the conical plug 73 is connected to one end of the spring 74, and the other end of the spring 74 is connected to the flat head end. In use, the conical plug 73 can move up and down under the action of the spring 74. When compressed air flows into the gas port 75, the pressure of the spring 74 is overcome, so that the conical plug 73 leaves the conical head end, and the gas port 75 is opened; when there is no compressed air in the valve port, the gas port 75 is in a closed state under the action of the spring 74.

[0063] As shown in Figure 1 , Figures 3-7 each one-way valve hole plate 91 separates the corresponding ventilation channel 27 into an upper channel and a lower channel, and two double-pass one-way valves 9 with opposite ventilation directions are installed on each one-way valve hole plate 91, and the two double-pass one-way valves 9 are located in the upper channel and the lower channel, respectively. Moreover, the left rear air chamber is connected to the first liquid gas chamber 25 through the left upper channel, and the double-pass one-way valve 9 in the left upper channel is upward ventilation; the left front air chamber is connected to the third liquid gas chamber 23 through the left lower channel, and the double-pass one-way valve 9 in the left lower channel is downward ventilation; the right rear air chamber is connected to the second liquid gas chamber 24 through the right upper channel, and the double-pass one-way valve 9 in the right upper channel is upward ventilation; the right front air chamber is connected to the fourth liquid gas chamber 22 through the right lower channel, and the double-pass one-way valve 9 in the right lower channel is downward ventilation.

[0064] As shown in Figure 3 , Figure 4 two valve ports 92 are provided in each ventilation channel 27 for installing two double-pass one-way valves 9. As shown in Figure 6 , Figure 7 the installation directions of the two double-pass one-way valves 9 in the same one-way valve hole plate 91 are opposite, that is, the ventilation directions of the two double-pass one-way valves 9 connected to the same piston chamber 26 are opposite. In specific implementation, the minimum pressure for the reverse opening of the double-pass one-way valve 9 is 2 standard atmospheres.

[0065] In the specific implementation, the first gas chamber port is formed on the inner wall of the left rear gas chamber, the first gas chamber port is communicated with the bottom surface of the first liquid gas chamber 25 through the left upper channel, and a double-way one-way valve 9 flowing upward is installed in the left upper channel; at the same time, the third gas chamber port is formed on the inner wall of the front gas chamber, the third gas chamber port is communicated with the bottom surface of the third liquid gas chamber 23 through the left lower channel, and a double-way one-way valve 9 flowing downward is installed in the left lower channel. At the same time, the second gas chamber port is formed on the inner wall of the right rear gas chamber, the second gas chamber port is communicated with the bottom surface of the second liquid gas chamber 24 through the right upper channel, and a double-way one-way valve 9 flowing upward is installed in the right upper channel; at the same time, the fourth gas chamber port is formed on the inner wall of the front gas chamber, the fourth gas chamber port is communicated with the bottom surface of the fourth liquid gas chamber 22 through the right lower channel, and a double-way one-way valve 9 flowing downward is installed in the right lower channel.

[0066] When the application is used for heating, the manually operated piston 3 moves upward, the refrigeration working medium in the first liquid gas chamber 25 can enter the first gas chamber port through the left upper channel, and then enter the left piston cavity 26 through the gas exchange one-way valve 8 in the left rear gas chamber; at the same time, the refrigeration working medium in the second liquid gas chamber 24 can enter the second gas chamber port through the right upper channel, and then enter the right piston cavity 26 through the gas exchange one-way valve 8 in the rear gas chamber.

[0067] When the manually operated piston 3 moves downward, the refrigeration working medium in the left piston cavity 26 can enter the third gas chamber port through the gas exchange one-way valve 8 in the left front gas chamber, and then enter the third liquid gas chamber 23 through the left lower channel; at the same time, the refrigeration working medium in the right piston cavity 26 can enter the fourth gas chamber port through the gas exchange one-way valve 8 in the front gas chamber, and then enter the fourth liquid gas chamber 22 through the double-way one-way valve 9 in the right lower channel.

[0068] When the gas pressure in the third liquid gas chamber 23 reaches 2-2.5 standard atmospheres or above, the refrigeration working medium in the third liquid gas chamber 23 is injected from the uplink port of the double-way one-way valve 9 in the left upper channel to the left upper channel, and then directly flows back to the first liquid gas chamber 25; at the same time, when the gas pressure in the fourth liquid gas chamber 22 reaches 2-2.5 standard atmospheres or above, the refrigeration working medium in the fourth liquid gas chamber 22 can be injected from the uplink port of the double-way one-way valve 9 in the right upper channel to the right upper channel, thereby directly flowing back to the second liquid gas chamber 24.

[0069] When the application is used for refrigeration, the sealing and rotatable structure of the piston rotating cap 7 is used to rotate the vertical partition plate 72 by 180°, that is, the direction of air inlet and air outlet in the piston rotating cap gas chamber can be changed, thereby realizing the switching of the heating and refrigeration functions.

[0070] The refrigeration working medium comprises a refrigerant with a low evaporation temperature and a refrigerant with a high evaporation temperature. The standard evaporation temperature of the refrigerant with a low evaporation temperature is 20-35 DEG C, and the refrigerant can be selected from high-temperature and low-pressure refrigerants such as diethyl ether, monofluorotrichloromethane, pentafluoropropane, freon or monochlorotetrafluoroethane. When the boiling point is 0-35 DEG C and the condensation pressure is 2-3 standard atmospheres, manual compression can be realized, and when the liquid-gas pressure in the evaporation heat absorption chamber is lower than 0.5 standard atmospheres and the evaporation temperature is lower than the room temperature, the heat absorption requirement can be met. The refrigerant with a high evaporation temperature can be selected from ethanol, and the evaporation temperature of ethanol under standard atmospheric pressure is 78.5 DEG C. Under a condensation pressure of 2-3 standard atmospheres, ethanol can be condensed to release heat, thereby realizing an output temperature of 110-120 DEG C.

[0071] In the specific implementation, when the gas pressure in the condensation heat release chamber is 2-3 standard atmospheres, the liquid-gas temperature of the refrigerant with a low evaporation temperature after condensation heat release can be higher than 60 DEG C. Moreover, the condensation compression chamber of the refrigerant with a low standard evaporation temperature and the evaporation heat absorption chamber of the refrigerant with a high evaporation temperature are separated by a metal thin wall and heat transfer fins, thereby forming a heat energy exchanger structure in the main box 2, and heat exchange is realized. Furthermore, when the liquid-gas pressure in the evaporation heat absorption chamber is lower than 0.5 standard atmospheres, the evaporation temperature of ethanol is lower than 60 DEG C, and the liquid-gas injected into the evaporation heat absorption chamber is immediately vaporized to absorb heat, absorbs the heat generated by the condensation of the refrigerant with a low evaporation temperature, and accelerates the condensation of the refrigerant with a low evaporation temperature until the liquid-gas in the ethanol evaporation heat absorption chamber reaches the saturation temperature under the liquid-gas pressure. In order to ensure the heat exchange power, the liquid-gas density of the evaporation heat absorption chambers of the two refrigeration working media is maintained at 0.2-0.5 standard atmospheres.

[0072] When the application is used to heat food, the refrigerant with a low evaporation temperature is diethyl ether, and is injected into the left piston cavity 26, i.e. the piston cavity 26 in communication with the first liquid-gas chamber 25 and the third liquid-gas chamber 23, and the injection amount is 80-90 ml; the diethyl ether circulates in the first liquid-gas chamber 25 and the third liquid-gas chamber 23, the first liquid-gas chamber 25 is an evaporation heat absorption chamber, and the third liquid-gas chamber 23 is a condensation heat release chamber. At the same time, the refrigerant with a high evaporation temperature is ethanol, and is injected into the right piston cavity 26, i.e. the piston cavity 26 in communication with the second liquid-gas chamber 24 and the fourth liquid-gas chamber 22, and the injection amount is 60-65 ml; the ethanol circulates in the second liquid-gas chamber 24 and the fourth liquid-gas chamber 22, the second liquid-gas chamber 24 is an evaporation heat absorption chamber, and the fourth liquid-gas chamber 22 is a condensation heat release chamber. Moreover, the second liquid-gas chamber 24 and the third liquid-gas chamber 23 are separated by only a metal thin wall, and the metal thin wall is transversely provided with heat transfer fins, so that the second liquid-gas chamber 24, the third liquid-gas chamber 23 and the metal thin wall therebetween form a heat energy exchanger. When the piston rotating cap 7 is rotated to the position shown in FIG. 1, the first liquid-gas chamber 25 and the second liquid-gas chamber 24 are in communication, and the third liquid-gas chamber 23 and the fourth liquid-gas chamber 22 are in communication. Figure 8 、 9When the initial position is shown, the movement of the piston 3 can achieve the heating of the food in the storage cavity 21, and the specific operation steps and principles are as follows:

[0073] First, unscrew the two piston cavity upper sealing cover, manually pull the piston handle 4, drive the two pistons 3 to move upward, the left piston cavity 26 uses the upward ventilation of the air exchange one-way valve 8 to suck the ether from the first liquid gas chamber 25, so that the ether enters the left piston cavity 26 from the left rear air cavity; at the same time, the right piston cavity 26 uses the upward ventilation of the air exchange one-way valve 8 to suck the ethanol from the second liquid gas chamber 24, so that the ethanol enters the right piston cavity 26 from the right rear air cavity.

[0074] Then, manually push the piston handle 4, drive the two pistons 3 to move downward, the left piston cavity 26 uses the downward ventilation of the air exchange one-way valve 8 to compress the ether from the left piston cavity 26 to the third liquid gas chamber 23, and the right piston cavity 26 uses the downward ventilation of the air exchange one-way valve 8 to compress the ethanol from the right piston cavity 26 to the fourth liquid gas chamber 22.

[0075] After the piston 3 is manually operated to move back and forth, the ether in the third liquid gas chamber 23 and the ethanol in the fourth liquid gas chamber 22 will be condensed into liquid state under high pressure conditions and release heat energy. Since the minimum pressure of the reverse opening of the double-way one-way valve 9 is 2 standard atmospheres, when the air pressure in the third liquid gas chamber 23 and the fourth liquid gas chamber 22 reaches 2-2.5 standard atmospheres, the upward channel of the double-way one-way valve 9 is opened, the ether in the third liquid gas chamber 23 is injected back to the first liquid gas chamber 25, and the ethanol in the fourth liquid gas chamber 22 is injected back to the second liquid gas chamber 24, and evaporates to absorb the heat energy from the outside. Then, the ether vaporized in the first liquid gas chamber 25 and the ethanol vaporized in the second liquid gas chamber 24 are respectively sucked back to the left piston cavity 26 and the right piston cavity 26 by the piston 3, and the cycle is repeated.

[0076] Moreover, the third liquid gas chamber 23 (the condensation heat release chamber of ether) and the second liquid gas chamber 24 (the evaporation heat absorption chamber of ethanol) are combined into a heat exchanger, and the heat energy transmission is quickly completed through the isolation of the metal thin wall and the heat transfer fins arranged transversely thereon. The evaporation heat absorption chamber of ether absorbs heat energy from the outside through the metal thin wall and the heat transfer fins, and the condensation heat release chamber of ethanol releases heat energy into the storage cavity 21.

[0077] When the application is used for frozen food, the specific operation is as follows: first, unscrew the two piston caps 7, pour out the working medium in the two piston cavities 26, then pour the ether into the right piston cavity 26, that is, the piston cavity 26 connected with the second liquid gas chamber 24 and the fourth liquid gas chamber 22, and the filling amount of the ether is 60-65ml; and pour the ethanol into the left piston cavity 26, that is, the piston cavity 26 connected with the first liquid gas chamber 25 and the third liquid gas chamber 23, and the filling amount of the ethanol is 80-90ml.

[0078] Then, two piston caps 7 are installed to the bottom openings of the corresponding piston cavities 26, and are rotated 180° compared to the position shown in the figure, so as to exchange the positions of the two air exchange one-way valves 8 and the air inlet and outlet directions of the piston cap cavities. Figure 9 、 Figure 10 After the completion of the refrigeration function setting switching, the piston cavity sealing caps 6 on the top surfaces of the two piston cavities 26 are unscrewed, and the operation can be performed by manually pushing and pulling the piston handle 4. Since the installation angle of the piston cap 7 has changed, the positions of the air exchange one-way valves 8 on the piston cap 7 have also changed, that is, the two air exchange one-way valves 8 that ventilate downward respectively connect the first liquid gas chamber 25 and the second liquid gas chamber 24, and the two air exchange one-way valves 8 that ventilate upward respectively connect the third liquid gas chamber 23 and the fourth liquid gas chamber 22. Thus, the ether circulates in the first liquid gas chamber 25 and the third liquid gas chamber 23, the first liquid gas chamber 25 becomes a condensation heat release chamber, and the third liquid gas chamber 23 becomes an evaporation heat absorption chamber; the ethanol circulates in the second liquid gas chamber 24 and the fourth liquid gas chamber 22, the second liquid gas chamber 24 becomes a condensation heat release chamber, and the fourth liquid gas chamber 22 becomes an evaporation heat absorption chamber, thereby realizing the switching of the heating and refrigeration functions.

[0079] Then, the ether in the fourth liquid gas chamber 22 (i.e., the evaporation heat absorption chamber) absorbs the heat of the food in the storage cavity 21 and transfers it to the second liquid gas chamber 24 (i.e., the condensation heat release chamber), and the second liquid gas chamber 24 transfers the heat to the third liquid gas chamber 23 (i.e., the condensation heat release section) through the heat energy exchanger functional structure, while the ethanol in the third liquid gas chamber 23 (i.e., the evaporation heat absorption chamber) absorbs the heat and releases the heat energy in the first liquid gas chamber 25 (i.e., the condensation heat release chamber), thereby completing the heat energy conversion.

[0080] Moreover, the air plug of the double-way one-way valve 9 has a minimum air opening resistance of 2-2.5 standard atmospheres, and the air pressures of the third liquid gas chamber 23 and the fourth liquid gas chamber 22 are 0.5 standard atmospheres. When the air pressures of the first liquid gas chamber 25 and the second liquid gas chamber 24 respectively exceed the air plug counter-thrust of the double-way one-way valve 9 leading to the third liquid gas chamber 23 and the fourth liquid gas chamber 22, the corresponding double-way one-way valve 9 opens downward, and the ethanol and the ether are respectively sprayed back to the third liquid gas chamber 23 and the fourth liquid gas chamber 22 and are condensed and released heat.

[0081] In summary, the present application uses the manually pressurized piston 3 to compress two different refrigeration working substances, which circulate in the corresponding two internal and external liquid gas chambers, respectively, to absorb the air heat energy from the outside or release the food heat, thereby realizing the functions of hot rice and hot water or frozen food, which is simple to operate, efficient and convenient. Moreover, no electric control elements are needed, which is safe, energy-saving and environmentally friendly.

[0082] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above example descriptions are only used to help understand the method and core idea of the present application. The technical solutions of various embodiments can be combined with each other, but it must be based on that a person having ordinary skill in the art can realize it, when the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope required by the present application. Meanwhile, for a person having ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application ranges, and the above description should not be understood as a limitation on the present application.

Claims

1. A manually operated air-source dual-purpose hot and cold food container, characterized in that, This includes the main box, piston assembly, liquid-gas assembly, and refrigerant; The main box includes a base, a storage cavity installed on the top of the base, a fourth liquid-gas chamber, a third liquid-gas chamber, a second liquid-gas chamber and a first liquid-gas chamber arranged sequentially around the outer periphery of the storage cavity from the inside to the outside, two piston chambers installed on the left and right sides of the first liquid-gas chamber respectively, and two ventilation channels connecting the left and right sides of the base and the bottom of the corresponding piston chamber respectively. The piston assembly includes a piston chamber sealing cap installed on the top surface of each piston chamber, a piston cap installed on the bottom surface of each piston chamber, and a piston placed inside each piston chamber; the top surfaces of the two pistons are respectively connected to the bottom end of a piston connecting rod, the top ends of the two piston connecting rods protrude through the corresponding piston chamber sealing caps, and are connected by a piston handle; The liquid-gas assembly includes a vertical partition installed on the bottom inner surface of each piston cap, a horizontal baffle installed on the top surface of the vertical partition, and a one-way valve orifice plate installed in each ventilation channel; the bottom of each piston chamber is divided into a front air chamber and a rear air chamber by the vertical partition and the horizontal baffle, and two ventilation one-way valves with opposite vertical ventilation directions are installed on the horizontal baffle, with the two ventilation one-way valves located in the front air chamber and the rear air chamber respectively; each ventilation channel is divided into an upper channel and a lower channel by the one-way valve orifice plate, and two double-way one-way valves with opposite vertical ventilation directions are installed on the one-way valve orifice plate, with the two double-way one-way valves located in the upper channel and the lower channel respectively; Furthermore, the left rear air chamber is connected to the first liquid-gas chamber via the left upper channel, and the double-way check valve in the left upper channel is for upward airflow; the left front air chamber is connected to the third liquid-gas chamber via the left lower channel, and the double-way check valve in the left lower channel is for downward airflow; the right rear air chamber is connected to the second liquid-gas chamber via the right upper channel, and the double-way check valve in the right upper channel is for upward airflow; the right front air chamber is connected to the fourth liquid-gas chamber via the right lower channel, and the double-way check valve in the right lower channel is for downward airflow. The refrigerant includes refrigerants with low evaporation temperatures and refrigerants with high evaporation temperatures; When this food container is used for heating, the refrigerant with a lower evaporation temperature is placed in the left piston chamber, and the refrigerant with a higher evaporation temperature is placed in the right piston chamber. The one-way valves in the front air chambers on both sides are for downward ventilation, and the one-way valves in the rear air chambers on both sides are for upward ventilation. When this food container is used for freezing, the refrigerant with a higher evaporation temperature is placed in the left piston chamber, and the refrigerant with a lower evaporation temperature is placed in the right piston chamber. The one-way valves in the front air chambers on both sides are for upward ventilation, and the one-way valves in the rear air chambers on both sides are for downward ventilation.

2. The manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, The storage cavity is equipped with a storage cavity sealing cover on its top surface. The storage cavity sealing cover includes a cover body and a handle connected to its top surface. The cover body has an inner and outer double-layer structure with an inner vacuum interlayer.

3. A manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, The storage cavity and piston cavity are cylindrical, and the fourth liquid-gas chamber, third liquid-gas chamber, second liquid-gas chamber and first liquid-gas chamber are annular cylindrical with the same central axis as the storage cavity.

4. A manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, A sealing rubber ring is provided at the connection between the piston cap and the bottom surface of the piston chamber.

5. A manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, The piston connecting rod is fitted with a frustum in the middle and is located below the piston chamber sealing cover.

6. A manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, The minimum opening pressure of the dual-way check valve is 2 standard atmospheres.

7. A manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, The third liquid-gas chamber and the second liquid-gas chamber are separated by a thin metal wall, and heat transfer fins perpendicular to the thin metal wall are arranged on the thin metal wall.

8. A manual air-source dual-purpose hot and cold food container according to claim 1 or 7, characterized in that, The outer wall of the first liquid-gas chamber is provided with heat transfer fins perpendicular to it.

9. A manual air-source dual-purpose hot and cold food container according to claim 1 or 7, characterized in that, The outer walls of the fourth liquid-gas chamber and the second liquid-gas chamber are double-layered structures with an inner and outer vacuum interlayer.

10. A manual air-source dual-purpose hot and cold food container according to claim 1, characterized in that, The refrigerant with a lower evaporation temperature is diethyl ether; the refrigerant with a higher evaporation temperature is ethanol.

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