A low-valley electricity storage heat and warm air supply device

Abstract

An embodiment of the present invention provides a low-valley electricity heat storage and warm air supply device, which relates to the technical field of thermal energy. It includes a heat preservation cavity, a Vuilleumier heat pump, and a heat storage medium built in the heat preservation cavity. The heat storage medium is connected to an external power supply device through a heating element. The room temperature cavity of the Vuilleumier heat pump is located outside the heat preservation cavity, and the medium temperature cavity and the high temperature cavity of the Vuilleumier heat pump are located inside the heat preservation cavity. The high temperature cavity of the Vuilleumier heat pump is thermally connected to the heat storage medium. The heat preservation cavity is provided with an air inlet and an air outlet. External air enters from the air inlet and sequentially passes through the medium temperature cavity, the high temperature cavity and the heat storage medium of the Vuilleumier heat pump and then is discharged from the air outlet. Among them, the heating element is heated during the low-valley electricity stage and stops heating during the peak electricity stage. The low-valley electricity heat storage and warm air supply device provided by the embodiment of the present invention adopts a Vuilleumier heat pump driven by thermal energy, gradually raises the temperature, improves the heating efficiency, saves electric energy, and reduces the heating cost.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal energy, and particularly to a low-valley electricity electric heat storage warm air supply device. Background Art

[0002] With the rapid development of the power industry, more and more power station systems have emerged in the country. During the low electricity consumption peak period, the load decreases, resulting in a large amount of surplus low-valley electricity. However, the characteristic of electric power products is that production, supply, and sales are completed simultaneously. The large amount of surplus low-valley electricity leads to a waste of electric power resources, which is not conducive to energy conservation and environmental protection. Therefore, different electricity prices are adopted for low-valley electricity and peak electricity to encourage people to use electricity during off-peak hours, improve energy utilization efficiency, and reduce waste.

[0003] In the cold winter, hot air heating is required indoors; for industrial operations such as drying, a large amount of hot air is also needed. Currently, the commonly used methods are indoor heating by air conditioners or other electric heating methods. However, most of these devices adopt real-time heating methods, which cannot achieve off-peak electricity use and have high heating costs. Summary of the Invention

[0004] An embodiment of the present invention provides a low-valley electricity electric heat storage warm air supply device to solve the defect of high warm air supply cost in the prior art, achieve off-peak electricity use, and reduce production costs.

[0005] An embodiment of the present invention provides a low-valley electricity electric heat storage warm air supply device, including a heat preservation cavity, a Vuilleumier heat pump, and a heat storage medium disposed inside the heat preservation cavity. The heat storage medium is connected to an external power supply device through a heating element. The room temperature cavity of the Vuilleumier heat pump is located outside the heat preservation cavity, and the medium temperature cavity and the high temperature cavity of the Vuilleumier heat pump are located inside the heat preservation cavity. The high temperature cavity of the Vuilleumier heat pump is thermally connected to the heat storage medium. The heat preservation cavity is provided with an air inlet and an air outlet. External air enters from the air inlet and sequentially passes through the medium temperature cavity, the high temperature cavity of the Vuilleumier heat pump, and the heat storage medium and then exits from the air outlet. Among them, the heating element is heated during the low-valley electricity stage and stops heating during the peak electricity stage.

[0006] For the low-valley electricity electric heat storage warm air supply device according to an embodiment of the present invention, one end of the heating element is installed inside the heat storage medium, and the other end of the heating element extends out of the heat preservation cavity.

[0007] For the low-valley electricity electric heat storage warm air supply device according to an embodiment of the present invention, the heating element is multiple.

[0008] For the low-valley electricity electric heat storage warm air supply device according to an embodiment of the present invention, the heat preservation cavity includes an outer wall and an inner wall. The outer wall is located outside the inner wall, and a heat preservation material is filled in the accommodation space formed between the inner wall and the outer wall.

[0009] The low-valley electricity heat storage and warm air supply device according to an embodiment of the present invention uses any one of magnesia bricks, steel balls, molten salts, and paraffins as the heat storage medium.

[0010] In the low-valley electricity heat storage and warm air supply device according to an embodiment of the present invention, the heat storage medium divides the heat preservation cavity into a left chamber and a right chamber, and the air inlet and the air outlet are respectively arranged in the left chamber and the right chamber.

[0011] In the low-valley electricity heat storage and warm air supply device according to an embodiment of the present invention, a base is fixedly installed in the heat preservation cavity, and the heat storage medium is stacked on the base.

[0012] In the low-valley electricity heat storage and warm air supply device according to an embodiment of the present invention, the air inlet is located below the medium-temperature cavity of the Vuilleumier heat pump, and the air outlet is located on the side of the base away from the air inlet.

[0013] A low-valley electricity heat storage and warm air supply device provided by an embodiment of the present invention uses a Vuilleumier heat pump driven by thermal energy. Compared with a vapor compression heat pump driven by traditional electric energy, the heat pump cycle driven by thermal energy absorbs heat in the room-temperature cavity and the high-temperature cavity and releases several times the heat absorbed in the high-temperature cavity in the medium-temperature cavity, improving the heating efficiency and effectively reducing the electricity cost at the same time; the entire low-valley electricity heat storage and warm air supply device uses low-valley electricity to heat air and then supplies heat during the peak electricity stage, saving electric energy and reducing the heating cost; the external air enters from the air inlet and is sequentially heated through the medium-temperature cavity and the high-temperature cavity, realizing the cascaded utilization of thermal energy and further improving the heating effect. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the low-valley electricity heat storage and warm air supply device provided by an embodiment of the present invention.

[0016] Reference Signs:

[0017] 10, heat preservation cavity; 11, air inlet; 12, air outlet; 13, outer wall; 14, inner wall; 15, heat preservation material; 20, Vuilleumier heat pump; 21, room-temperature cavity; 22, medium-temperature cavity; 23, high-temperature cavity; 30, heat storage medium; 40, heating element; 50, base. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "first" and "second" are used for numbering the product components for clear description and do not represent any substantial difference. The directions of "up", "down", "left", and "right" are subject to the directions shown in the accompanying drawings. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0020] The following Figure 1 describes the structure of the low-valley electricity heat storage and warm air supply device according to the embodiments of the present invention.

[0021] As Figure 1 shown, the low-valley electricity heat storage and warm air supply device provided by the embodiments of the present invention includes a heat preservation cavity 10, a Vuilleumier heat pump 20, and a heat storage medium 30 disposed inside the heat preservation cavity 10. The heat storage medium 30 is connected to an external power supply device through a heating element 40. The external power supply device is electrically connected to the heating element 40. The heating element 40 is used to heat the heat storage medium 30, and the heat is stored in the heat storage medium 30. The room temperature cavity 21 of the Vuilleumier heat pump 20 is located outside the heat preservation cavity 10, and the medium temperature cavity 22 and the high temperature cavity 23 of the Vuilleumier heat pump 20 are located inside the heat preservation cavity 10. The high temperature cavity 23 of the Vuilleumier heat pump 20 is thermally connected to the heat storage medium 30. The heating element 40 can heat the heat storage medium 30 and the high temperature cavity of the Vuilleumier heat pump 20 simultaneously. The heat preservation cavity 10 is provided with an air inlet 11 and an air outlet 12. External air enters from the air inlet 11 and sequentially passes through the medium temperature cavity 22, the high temperature cavity 23 of the Vuilleumier heat pump 20, and the heat storage medium 30 and then exits from the air outlet 12. Among them, the heating element 40 performs heating during the low-valley electricity stage and stops heating during the peak electricity stage.

[0022] In use, after the device is turned on, the Vuilleumier heat pump 20 starts to operate continuously. The external air continuously entering from the air inlet 11 is heated into high-temperature air and then discharged from the air outlet 12 to supply users. During the low-valley electricity period, the heating element 40 continuously heats the heat storage medium 30 and the high-temperature chamber 23, converts electrical energy into heat energy and stores it in the heat storage medium 30. After the external air enters from the air inlet 11, it sequentially passes through the medium-temperature chamber 22 and the high-temperature chamber 23 of the Vuilleumier heat pump 20, then passes through the heat storage medium 30 and is heated into high temperature and then discharged from the air outlet 12; during the peak electricity period, the heating element 40 stops heating, and the Vuilleumier heat pump 20 continues to operate. The external air still sequentially passes through the medium-temperature chamber 22, the high-temperature chamber 23 and the heat storage medium 30 and is heated into high-temperature air, so as to store energy with low-valley electricity, improve the utilization rate of electrical energy and reduce the heating cost at the same time. In addition, after the external air enters from the air inlet 11, it is gradually heated up by passing through the medium-temperature chamber 22 and the high-temperature chamber 23 in sequence, realizing the cascaded utilization of heat energy and further improving the heating effect.

[0023] The low-valley electricity heat storage warm air supply device provided by the embodiment of the present invention uses low-valley electricity to heat air and then supplies heat during the peak electricity period, effectively saving electrical energy. The Vuilleumier heat pump 20 driven by heat energy is installed at the air inlet 11. Compared with the traditional steam compression heat pump driven by electrical energy, the heat pump cycle driven by heat energy absorbs heat in the room temperature chamber 21 and the high-temperature chamber 23 and releases several times the heat absorbed by the high-temperature chamber 23 in the medium-temperature chamber 22, improving the heating efficiency and effectively reducing the electricity cost at the same time. In addition, the Vuilleumier heat pump 20 is directly driven by heat energy and has low power consumption, further reducing the electricity cost.

[0024] One end of the heating element 40 is installed inside the heat storage medium 30, and the other end of the heating element 40 extends out of the heat preservation cavity 10. As Figure 1 shown, the heating element 40 transversely penetrates the entire heat storage medium 30 and extends through the heat preservation cavity 10 to the outside of the heat preservation cavity 10 so as to be connected to the electrical lead of the external power supply device.

[0025] On the basis of any of the above embodiments, there may be multiple heating elements 40. The multiple heating elements 40 are arranged in parallel, which is convenient for connecting to the electrical leads of the external power supply device. Of course, the multiple heating elements 40 can be arranged in different directions. For example, some heating elements 40 are arranged horizontally, and other heating elements 40 are arranged vertically. By heating the heat storage medium 30 simultaneously with the multiple heating elements 40, the heat storage medium 30 can quickly accumulate a large amount of heat and the temperature rises quickly.

[0026] The heat preservation cavity 10 includes an outer wall 13 and an inner wall 14. The outer wall 13 is located outside the inner wall 14, and a heat preservation material 15 is filled in the accommodation space formed between the inner wall 14 and the outer wall 13. As Figure 1As shown, the inner wall 14 is connected to the outer wall 13 and a certain accommodation space is formed therebetween. The accommodation space is filled with a heat insulation material 15 to prevent heat from diffusing outward and improve the utilization rate of thermal energy. The heat insulation material 15 can be any one or a combination of polyester foam, glass wool, and rock wool, and the embodiments of the present invention do not make specific limitations thereon.

[0027] In the embodiments of the present invention, the heat storage medium 30 adopts solid heat storage materials such as magnesite bricks and steel balls, or phase change heat storage materials such as molten salts and paraffin waxes, and has a high heat storage density. For example, the heat storage medium 30 is stacked by multiple magnesite bricks or steel blocks. Another example is that the heat storage medium 30 adopts a high-temperature molten salt, and the high-temperature molten salt is received in a shell-shaped structure. Of course, the heat storage medium 30 can also adopt a thermochemical heat storage material or an adsorption heat storage material. As Figure 1 shown, the heat storage medium 30 divides the heat preservation cavity 10 into a left chamber and a right chamber, and the air inlet 11 and the air outlet 12 are respectively arranged in the left chamber and the right chamber to ensure that the air entering the heat preservation cavity 10 passes through the heat storage medium 30 before being discharged to fully absorb heat. For example, the air inlet 11 can be arranged in the left chamber, and correspondingly, the air outlet 12 is arranged in the right chamber; another example is that the air inlet 11 is arranged in the right chamber and the air outlet 12 is arranged in the left chamber. The Vuilleumier heat pump 20 is installed at the air inlet 11 to ensure that the external air is successively heated in a stepped manner through the medium-temperature chamber 22 and the high-temperature chamber 23 after entering, improving the heat utilization rate and the air heating effect. Specifically, the sizes of the left chamber and the right chamber can be the same or different, and the left and right are only used to distinguish the two chambers and do not make any orientation limitations. After the external air enters from the air inlet 11, it needs to pass through the heat storage medium 30 to absorb heat and turn into high-temperature air, and then be discharged from the air outlet 12.

[0028] Specifically, as Figure 1 shown, a base 50 is fixedly installed in the heat preservation cavity 10, and the heat storage medium 30 is arranged on the base 50. The heat storage medium 30 can be in contact with the top of the heat preservation cavity 10, or a certain gap can be reserved for the thermal expansion and contraction of the heat storage medium 30. The heat storage medium 30 is connected to the base 50 and divides the heat preservation cavity 10 into two chambers. The high-temperature chamber 23 is thermally connected to the heat storage medium 30. To avoid the medium-temperature chamber 22 being affected by the heat storage medium 30, the medium-temperature chamber 22 is arranged corresponding to the base 50. For example, the arrangement directions of the high-temperature chamber 23 and the medium-temperature chamber 22 are the same as the arrangement directions of the heat storage medium 30 and the base 50.

[0029] Among them, the medium-temperature chamber 22 is respectively connected to the room-temperature chamber 21 and the high-temperature chamber 23 through connecting pipes. The connecting pipe connecting the medium-temperature chamber 22 and the room-temperature chamber 21 passes through the wall surface of the heat preservation cavity 10, and the connecting pipe connecting the medium-temperature chamber 22 and the high-temperature chamber 23 is located inside the heat preservation cavity 10.

[0030] In an embodiment of the present invention, the air inlet 11 is located below the medium-temperature chamber 22 of the Vuilleumier heat pump 20, and the air outlet 12 is located on the side of the base 50 away from the air inlet 11. An air inlet fan can be installed at the air inlet 11, and an air outlet fan can be installed at the air outlet 12. The air entering from the air inlet 11 flows upward from the bottom, sequentially passes through the medium-temperature chamber 22 and the high-temperature chamber 23, then passes through the heat storage medium 30, and is discharged from the air outlet 12 on the other side of the heat storage medium 30. The air outlet 12 is arranged corresponding to the base 50, so that the high-temperature air after passing through the heat storage medium 30 is fully mixed before being discharged, avoiding local high temperature.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-valley electricity storage heat and warm air supply device, characterized in that It includes a heat-insulating cavity, a Vuilleumier heat pump, and a heat storage medium built into the heat-insulating cavity. The heat storage medium is connected to an external power supply device through a heating element. The room-temperature cavity of the Vuilleumier heat pump is located outside the heat-insulating cavity, and the medium-temperature cavity and the high-temperature cavity of the Vuilleumier heat pump are located inside the heat-insulating cavity. The high-temperature cavity of the Vuilleumier heat pump is thermally connected to the heat storage medium. The heat-insulating cavity is provided with an air inlet and an air outlet. External air enters from the air inlet and sequentially passes through the medium-temperature cavity, the high-temperature cavity of the Vuilleumier heat pump, and the heat storage medium and then exits from the air outlet. Among them, the heating element heats during the low-peak electricity stage and stops heating during the high-peak electricity stage.

2. The low-valley electricity storage heat and warm air supply device according to claim 1, characterized in that, One end of the heating element is installed inside the heat storage medium, and the other end of the heating element extends out of the heat-insulating cavity.

3. The low-valley electricity storage heat warm air supply device according to claim 2, characterized in that, There are multiple heating elements.

4. The low valley electricity electric heat storage warm air supply device according to claim 1, characterized in that, The heat-insulating cavity includes an outer wall and an inner wall. The outer wall is located outside the inner wall, and a heat-insulating material is filled in the accommodation space formed between the inner wall and the outer wall.

5. The low-valley electricity storage heat and warm air supply device according to claim 1, characterized in that The heat storage medium adopts any one of magnesia bricks, steel balls, molten salts, and paraffin.

6. The low-valley electricity electric heat storage warm air supply device according to claim 1, wherein The heat storage medium divides the heat-insulating cavity into a left chamber and a right chamber, and the air inlet and the air outlet are respectively arranged in the left chamber and the right chamber.

7. The low-valley electricity electric heat storage warm air supply device according to any one of claims 1 to 6, characterized in that A base is fixedly installed in the heat-insulating cavity, and the heat storage medium is stacked on the base.

8. The low-valley electricity storage heat warm air supply device according to claim 7, characterized in that, The air inlet is located below the medium-temperature cavity of the Vuilleumier heat pump, and the air outlet is located on the side of the base away from the air inlet.

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