Heat energy recovery system

Abstract

The utility model provides a heat energy recovery system which comprises a shell, a condensation assembly, a compressor and a transduction tank. An oil fume channel for oil fume to pass through is formed in the shell; a condensation assembly for reducing the temperature of the oil smoke is arranged in the oil smoke channel; the transduction tank comprises an outer tank body, an inner tank body is mounted in the outer tank body, a refrigerant is introduced into the outer tank body, a water pipe is wound outside the tank body, two ends of the water pipe extend out of the outer tank body, and cold water is introduced into the water pipe; the refrigerant inlet end of the condensation assembly is connected with the transduction tank, and the refrigerant outlet end of the condensation assembly is connected with a compressor; a low-temperature and low-pressure refrigerant is input into the compressor after being vaporized in the condensation assembly, and a high-temperature and high-pressure refrigerant output by the compressor flows through the transduction tank so that the temperature of the cold water can be increased. According to the utility model, heat is circulated between oil fume and cold water through vaporization and liquefaction of a refrigerant, so that the heat generated by the kitchen oil fume is effectively recovered, and the space required by a condenser is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a heat energy recovery system. Background Art

[0002] There are many ways to cook food, and the emission components are complex and changeable, with high viscosity and difficult to clean. Affected by factors such as cooking oil, cooking methods, dishes, and cuisines, the oil smoke emitted by the catering service industry is a complex organic waste gas with large air volume, low concentration, oily sticky particles, and high water vapor. It is difficult to purify and separate it. Based on the physical phenomenon that gas liquefies when cooled, there is a way to liquefy the oil and water in the oil smoke by condensation to achieve the effect of oil fume purification.

[0003] Existing condensing oil fume purifiers usually place the condensation component in the rising path of the oil fume. When the oil fume rises, it contacts the condensation component and the oil and water vapor are liquefied, thereby removing it. During condensation, the low-temperature refrigerant is heated and vaporized. In order to liquefy the vaporized refrigerant, a condenser is usually required to liquefy the gaseous refrigerant for use by the condensation component. However, in a kitchen environment, the installation of a condenser requires a high space requirement, and it is difficult to liquefy the refrigerant. At the same time, there are a large number of occasions in the kitchen environment where hot water is needed. Therefore, there is an urgent need for a heat recovery system that can absorb heat from oil fumes and be used for cold water heating. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model proposes a heat recovery system, which can circulate heat between oil smoke and cold water through the vaporization and liquefaction of refrigerant, effectively utilizing the heat generated by kitchen oil smoke and eliminating the space required for setting up a condenser.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A heat recovery system comprises a shell, a condensation component, a compressor and an energy conversion tank; an oil fume channel for oil fume to pass through is formed in the shell; a condensation component for reducing the temperature of oil fume is arranged in the oil fume channel; the energy conversion tank comprises an outer tank body, an inner tank body is installed inside the outer tank body, a gas-liquid outlet is opened on the inner tank body, a water pipe is arranged around the inner tank body, both ends of the water pipe extend out of the outer tank body, and cold water flows in the water pipe; the refrigerant inlet end of the condensation component is connected to the energy conversion tank, and the refrigerant outlet end of the condensation component is connected to the compressor; the low-temperature and low-pressure refrigerant is vaporized in the condensation component and then input into the compressor, and the compressor outputs the high-temperature and high-pressure refrigerant that flows through the energy conversion tank to heat the cold water.

[0007] In one embodiment, the condensation component includes an evaporator and a velvet filter mesh, wherein the velvet filter mesh is covered on the bottom of the evaporator, and the cold energy of the evaporator is transferred to the velvet filter mesh to condense and purify the oil smoke passing through the velvet filter mesh and the evaporator.

[0008] In one embodiment, a filter and a liquid separator are provided between the energy conversion tank and the refrigerant inlet end. The refrigerant enters the liquid separator after being filtered by the filter, and the liquid separator inputs the filtered refrigerant into the condensing assembly through a capillary tube.

[0009] In one embodiment, the evaporator is arranged to be inclined with respect to a horizontal plane.

[0010] In one embodiment, the fin group extends along the condensation channel and is bent in a wave shape.

[0011] In one embodiment, the interior of the filter velvet net is covered with ant hole-like structures and is made of metal material.

[0012] In one embodiment, louver-shaped blades are provided on the outer wall of the inner tank body, and the blades are in contact with the outer wall of the water pipe.

[0013] In one embodiment, it further includes an input pipe, which passes through the outer tank body and the inner tank body in sequence and is arranged inside the inner tank body. The upper end of the water pipe is the water outlet end, and the lower end of the water pipe is the water inlet end.

[0014] Preferably, the water pipe comprises an inner pipe and an outer pipe, the outer pipe is sleeved outside the inner pipe, the outer wall of the inner pipe is threaded or smoothly arranged, and the inner wall of the outer pipe is threaded or smoothly arranged.

[0015] Preferably, the blades are made of graphite.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The embodiment of the utility model sets a condensation component in the oil fume passage, reduces the temperature of oil gas and water vapor in the process of oil fume rising through the condensation component, realizes the condensation and liquefaction of oil gas and water vapor, and removes them from the oil fume; the condensation component, the compressor, and the energy conversion tank are connected in sequence so that the low-temperature and low-pressure refrigerant absorbs the heat of the oil fume in the condensation component and vaporizes and then enters the compressor, and the compressor outputs high-temperature, high-pressure, and high-boiling point gaseous refrigerant into the energy conversion tank, and water is passed through the water pipe, and the heat of the gaseous refrigerant is transferred by contacting the water pipe, and the water in the water pipe absorbs heat and is heated to hot water and discharged, and the gaseous refrigerant releases heat and cools to liquid refrigerant, so that the gaseous refrigerant passing through the inner tank body can circulate into the condensation component in the form of liquid. The utility model fully recovers the heat generated by kitchen oil fume by setting the energy conversion tank in the product, and uses the heat for cooling and liquefying the refrigerant and heating the cold water, while eliminating the space required for setting the condenser. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 This is a structural schematic diagram of a heat recovery system of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the condensation component in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the energy conversion tank in the utility model;

[0022] Figure 4 This is a cross-sectional view of a water pipe in an embodiment of the utility model;

[0023] Figure 5 This is a cross-sectional view of a water pipe according to another embodiment of the present invention.

[0024] Figure identification: 1-condensation assembly; 11-evaporator; 12-filter velvet net; 13-fin group; 2-energy conversion tank; 21-outer tank body; 22-inner tank body; 23-water pipe; 24-inner pipe; 25-outer pipe; 26-blade; 3-compressor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figures 1 to 5 The utility model discloses a heat recovery system, including a shell, a condensing component 1, a compressor 3 and an energy conversion tank 2; an oil fume channel for oil fume to pass through is formed in the shell; a condensing component 1 for reducing the temperature of oil fume is arranged in the oil fume channel; the energy conversion tank 2 includes an outer tank body 21, an inner tank body 22 is installed in the outer tank body 21, and a plurality of gas-liquid outlets are arranged on the inner tank body 22, a refrigerant is passed through the inner tank body 22, a water pipe 23 is arranged around the outer side of the inner tank body 22, both ends of the water pipe 23 extend out of the outer tank body, and cold water is passed through the water pipe 23; the refrigerant inlet end of the condensing component 1 is connected to the outer tank body of the energy conversion tank 2 through an output pipe arranged on the outer tank body of the energy conversion tank 2, and the refrigerant outlet end of the condensing component 1 is connected to the compressor 3; the low-temperature and low-pressure refrigerant is vaporized in the condensing component 1 and then input into the compressor 3, and the compressor 3 outputs a high-temperature and high-pressure refrigerant that flows through the energy conversion tank 2 to heat the cold water.

[0029] The working principle of the utility model is as follows: when the range hood is working, the stove at the bottom generates a large amount of oil smoke, and the heat of the oil smoke and the heat of the stove itself rises with the air, enters the oil smoke channel in the shell and contacts the condensation component 1, and the low-temperature and low-pressure refrigerant absorbs the heat of the oil smoke in the condensation component 1 and vaporizes and then enters the compressor 3, and the compressor 3 outputs a high-temperature, high-pressure and high-boiling point gaseous refrigerant into the energy conversion tank 2, and water is passed through the water pipe 23. The heat of the gaseous refrigerant is transferred to the water pipe 23 through the tank body, and the water in the water pipe 23 absorbs heat and is heated to hot water and discharged. The gaseous refrigerant releases heat and is cooled to a liquid refrigerant, so that the gaseous refrigerant passing through the inner tank body 22 can circulate into the evaporator 11 in a liquid form.

[0030] Specifically, after the gas-liquid mixed refrigerant to be heat exchanged enters the inner tank body 22 through the refrigerant inlet on the upper side, the gaseous refrigerant rises to the upper part of the inner tank body. During the rising process, part of the gaseous refrigerant heat-exchanges and condenses and falls to the lower part of the inner tank body, and the remaining part enters the area between the inner tank body and the outer tank body from the gas-liquid outlet at the top, and then heat-exchanges and condenses and falls to the lower part of the outer tank body; while the liquid refrigerant falls to the lower part of the inner tank body, enters the area between the inner tank body and the outer tank body from the gas-liquid outlet, and then is delivered to the condensation component through the output pipe. Among them, when the gaseous refrigerant flows in the area between the inner tank body and the outer tank body, it is blocked by the blades, which accelerates the condensation of the gaseous refrigerant.

[0031] like Figure 2 and Figure 3 As shown, in this embodiment, in order to fully increase the contact area between the condensation component 1 and the oil fume and realize the cooling of the oil fume by the refrigerant and the recovery of heat, the condensation component 1 includes an evaporator 11 and a filter velvet mesh 12. The filter velvet mesh 12 is covered and arranged on the bottom end of the evaporator 11. The cold energy of the evaporator 11 is transferred to the filter velvet mesh 12 to condense and purify the oil fume passing through the filter velvet mesh 12 and the evaporator 11. Specifically, the evaporator 11 is a device that transports low-temperature refrigerant through a copper tube to cool the air flowing through it when it contacts the fin group 13. The present application sets the evaporator 11 in the oil fume passage through which the oil fume passes, condenses and liquefies the oil gas and water vapor in the oil fume, and reduces the pollution in the oil fume. In order to further increase the collision between the oil fume and the low-temperature metal, the filter velvet mesh 12 is fixed on the lower side of the evaporator 11, and the cold on the evaporator 11 can be transferred to the filter velvet mesh 12. The honeycomb shape and ant hole shape in the filter velvet mesh 12 can effectively increase the internal area, thereby extending the number of collisions between the oil fume passing through and the filter velvet mesh 12, and achieving more sufficient condensation and heat recovery for the oil fume. The filter velvet mesh 12 is configured to be made of metal material, which has better thermal conductivity and can effectively transfer the cold generated by the evaporator 11. In addition, since droplets will adhere to the filter velvet mesh 12 when passing through it, the filter velvet mesh 12 made of metal material can be easier to clean.

[0032] Furthermore, the fin group 13 is tilted and extends along the condensation channel and is bent in a wave shape, which effectively increases the contact area between the high-temperature oil smoke and the fin group 13, thereby taking away the heat of the oil smoke.

[0033] In a preferred embodiment, a filter and a liquid separator are provided between the energy conversion tank 2 and the refrigerant inlet end. The refrigerant enters the liquid separator after being filtered by the filter, and the liquid separator inputs the filtered refrigerant into the condensation component 1 through a capillary tube.

[0034] like Figure 4 As shown, the outer wall of the inner tank body 22 is provided with louver-shaped blades 26, and the blades 26 are in contact with the outer wall of the water pipe 23. The blades 26 greatly increase the base area of ​​the inner tank body 22 and the water pipe 23, and enhance the heat transfer between the tank body and the water pipe 23, so that the heat in the inner tank body 22 can be introduced into the water pipe 23 more quickly through the blades 26, which can effectively reduce the refrigerant temperature to ensure the condensation effect of the evaporator 11 on the oil smoke, and heat the cold water for recycling.

[0035] Specifically, the upper part of the inner tank body 22 has a refrigerant inlet, the upper end of the water pipe 23 is the water outlet, and the lower end of the water pipe 23 is the water inlet. The refrigerant enters the inner tank body 22 in the form of gas from the refrigerant inlet at the upper part of the inner tank body 22, and is discharged from the refrigerant outlet at the lower part of the inner tank body 22 in the form of liquid after cooling and releasing heat; the cold water of the water pipe 23 enters from the water inlet at the lower end of the water pipe 23, and is discharged from the water outlet at the upper end of the water pipe 23 after absorbing heat; that is, the refrigerant flows from top to bottom, while the water flows from bottom to top, and the two directions are opposite. When countercurrent heat transfer occurs, the temperature difference between the cold and hot fluids is the largest, and the maximum heat exchange effect can be achieved, and the problem of insufficient heat exchange caused by too low or too high temperature intersection can be avoided, ensuring that heat can be effectively transferred in the entire heat exchange process. In addition, this countercurrent heat transfer setting can make the temperature distribution of the heat transfer surface more uniform, which helps to reduce thermal stress or heat loss caused by uneven temperature distribution. In actual use, a pipeline passing through the outer tank body 21 can be set to connect the refrigerant inlet and the evaporator 11 outlet, and another pipeline can be set to connect the refrigerant outlet and the evaporator 11 inlet, so that the refrigerant can circulate in the heat recovery system.

[0036] Preferably, the water pipe 23 includes an inner pipe 24 and an outer pipe 25, the outer pipe is sleeved outside the inner pipe, the outer wall of the inner pipe 24 is threaded or smooth, and the inner wall of the outer pipe 25 is threaded or smooth. The threaded setting has a larger heat transfer area, which is conducive to the transfer of heat to the cold water.

[0037] Preferably, the blades 26 are made of graphite. Graphite has high thermal conductivity, which can ensure the heat transfer effect of the blades 26. The plasticity of graphite enables the blades 26 to be made into a louver shape to meet the rapid heat dissipation requirements of the refrigerant.

[0038] The utility model fully recovers the heat generated by kitchen fumes by arranging an energy conversion tank in the product, and uses the heat for cooling and liquefying the refrigerant and heating the cold water, while eliminating the space required for arranging a condenser.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat recovery system, characterized in that: The invention comprises a shell, a condensation assembly (1), a compressor (3) and an energy conversion tank (2); an oil fume passage for oil fume to pass through is formed in the shell; a condensation assembly (1) for reducing the temperature of oil fume is arranged in the oil fume passage; the energy conversion tank (2) comprises an outer tank body (21), an inner tank body (22) is installed in the outer tank body (21), a gas-liquid outlet is opened on the inner tank body (22), a water pipe (23) is arranged around the outer side of the inner tank body (22), both ends of the water pipe (23) extend out of the outer tank body, and cold water flows in the water pipe (23); The refrigerant inlet end of the condensing component (1) is connected to the energy conversion tank (2), and the refrigerant outlet end of the condensing component (1) is connected to the compressor (3); the low-temperature and low-pressure refrigerant is vaporized in the condensing component (1) and then input into the compressor (3), and the compressor (3) outputs the high-temperature and high-pressure refrigerant which flows through the energy conversion tank (2) to heat the cold water.

2. The heat recovery system according to claim 1, characterized in that: The condensation component (1) comprises an evaporator (11) and a velvet filter mesh (12), wherein the velvet filter mesh (12) is arranged to cover the bottom end of the evaporator (11), and the cold energy of the evaporator (11) is transferred to the velvet filter mesh (12) to condense and purify the oil smoke passing through the velvet filter mesh (12) and the evaporator (11).

3. The heat recovery system according to claim 1, characterized in that: A filter and a liquid separator are provided between the energy conversion tank (2) and the refrigerant inlet end. The refrigerant is filtered by the filter and then enters the liquid separator. The liquid separator inputs the filtered refrigerant into the condensation component (1) through a capillary tube.

4. The heat recovery system according to claim 2, characterized in that: The evaporator (11) is arranged at an angle.

5. The heat recovery system according to claim 2, characterized in that: The fin group (13) in the evaporator (11) extends along the direction of the condensation channel and is bent in a wave shape.

6. The heat recovery system according to claim 2, characterized in that: The interior of the filtering velvet net (12) is covered with ant hole-like structures and is made of metal material.

7. The heat recovery system according to claim 1, characterized in that: The outer wall of the inner tank body (22) is provided with louver-shaped blades (26), and the blades (26) are in contact with the outer wall of the water pipe (23).

8. The heat recovery system according to claim 1, characterized in that: It also includes an input pipe, which passes through the outer tank body and the inner tank body in sequence and is arranged inside the inner tank body. The upper end of the water pipe is the water outlet end, and the lower end of the water pipe is the water inlet end.

9. The heat recovery system according to claim 1, characterized in that: The water pipe (23) comprises an inner pipe (24) and an outer pipe (25), wherein the outer pipe (25) is sleeved outside the inner pipe (24), the outer wall of the inner pipe (24) is threaded or smoothly arranged, and the inner wall of the outer pipe (25) is threaded or smoothly arranged.

10. The heat recovery system according to claim 7, characterized in that: The blades (26) are made of graphite.

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