Kitchen waste heat recovery and utilization integrated system

Abstract

The present invention relates to the technical field of kitchen waste heat utilization, and more specifically, to an integrated kitchen waste heat recovery and utilization system. The integrated kitchen waste heat recovery and utilization system includes a waste heat recovery system and a waste heat utilization system. The waste heat recovery system includes a generator, which is mounted on the periphery of the stove and is used to absorb the heat generated by the stove; the waste heat utilization system is connected to the steam outlet of the generator and is used to transfer the heat in the steam to a water tank, indoors or outdoors. The integrated kitchen waste heat recovery and utilization system provided by the present invention can reduce the waste heat directly released into the kitchen, reduce the impact on the comfort of people in the kitchen, and can realize the reuse of waste heat, thereby reducing heat waste.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen waste heat utilization, and in particular to an integrated kitchen waste heat recovery and utilization system. Background Art

[0002] The kitchen is an important part of the house. A lot of time needs to be spent in this room preparing food for family members. When cooking food on the stove, a lot of waste heat is often generated. This waste heat will be directly released into the kitchen, causing the room temperature to rise, which not only affects the comfort of people in the kitchen, but also causes heat waste. Summary of the Invention

[0003] The purpose of the present invention is to provide an integrated kitchen waste heat recovery and utilization system to alleviate the technical problems of the prior art of cooking food on stoves that affect the comfort of people in the kitchen and waste heat.

[0004] The kitchen waste heat recovery and utilization integrated system provided by the present invention comprises a waste heat recovery system and a waste heat utilization system.

[0005] The waste heat recovery system includes a generator, which is mounted on the periphery of the stove and is used to absorb the heat generated by the stove; the waste heat utilization system is connected to the steam outlet of the generator and is used to transfer the heat in the steam to a water tank, indoors or outdoors.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] In summer or other environments where room temperatures are already high, the generator's recovery of stove heat reduces the amount of waste heat released directly into the kitchen. Furthermore, by transferring the heat from the steam outdoors, the kitchen's temperature rise is reduced, keeping it cool and minimizing the impact of direct waste heat release on the comfort of occupants. When hot water is needed, the heat from the steam can be transferred to the water tank, heating the water there to meet the demand for hot water preparation and providing it for user use. For example, this can be used to wash kitchenware and tableware, reusing waste heat and reducing heat waste. When indoor temperatures are low, the heat from the steam can be transferred indoors to heat the indoor environment, meeting winter heating needs, similarly reusing waste heat and reducing heat waste.

[0008] Preferably, as an implementable embodiment, the stove has an inner circle fire hole and an outer circle fire hole, the inner circle fire generated when the inner circle fire hole is ventilated is used to heat the cookware, and the residual heat is used to heat the generator; the outer circle fire generated when the outer circle fire hole is ventilated is used to heat the generator.

[0009] The beneficial effect is that the waste heat generated by cooking food can be recycled and utilized, and the stove can be used to prepare hot water or heat the room when cooking is not needed.

[0010] Preferably, as an implementable embodiment, the waste heat recovery system includes a solution circulation pump and an absorber, the solution circulation pump is connected between the absorber and the generator, and is used to drive the solution to circulate between the absorber and the generator; the waste heat utilization system is connected between the steam outlet of the generator and the absorber.

[0011] The beneficial effect is that the solution can be recycled and water resources can be saved.

[0012] Preferably, as an implementable embodiment, a solution-side throttle valve is connected between the solution outlet of the generator and the solution inlet of the absorber.

[0013] The beneficial effect is that the setting of the solution-side throttle valve is conducive to reducing the pressure in the absorber, so that the steam originally output by the generator can flow back to the absorber smoothly after passing through the waste heat utilization system.

[0014] Preferably, as an implementable embodiment, the waste heat utilization system includes a hot water preparation device, which includes a first heat exchanger and a water circulation pump. The water circulation pump is connected between the water channel of the first heat exchanger and the water tank, and is used to drive water to circulate between the first heat exchanger and the water tank; the steam channel of the first heat exchanger is connected between the steam outlet of the generator and the absorber.

[0015] The beneficial effect is that the water in the water tank can be continuously heated, so that the water in the water tank is heated up and becomes hot water for users to use.

[0016] Preferably, as an implementable embodiment, the direction of water flow in the water channel is opposite to the direction of steam flow in the steam channel.

[0017] The beneficial effect is that the heat exchange efficiency of the first heat exchanger can be improved.

[0018] Preferably, as an implementable embodiment, the waste heat utilization system includes an air-conditioning device, the air-conditioning device includes a second heat exchanger, the second heat exchanger is connected between the first heat exchanger and the absorber, and the second heat exchanger is placed in the range hood.

[0019] The beneficial effect is that the heat in the oil smoke can be recycled, further improving the waste heat utilization rate and reducing heat waste.

[0020] Preferably, as an implementable embodiment, the air-conditioning device includes a third heat exchanger, the third heat exchanger is connected between the first heat exchanger and the absorber, and the third heat exchanger is placed indoors.

[0021] The beneficial effect is that the heating function of the indoor environment can be realized.

[0022] Preferably, as an implementable embodiment, one side of the third heat exchanger is connected to one side of the second heat exchanger through an air-conditioning side throttle valve.

[0023] The other side of the second heat exchanger is connected to the first heat exchanger, and the other side of the third heat exchanger is connected to the absorber; or, the other side of the second heat exchanger is connected to the absorber, and the other side of the third heat exchanger is connected to the first heat exchanger.

[0024] The beneficial effect is that it can realize the cooling and heating functions of the indoor environment and can also recover the heat of the oil smoke.

[0025] Preferably, as an implementable embodiment, a four-way reversing valve is connected between the hot water preparation device and the air-conditioning device, and the four ports of the four-way reversing valve are respectively connected to the first heat exchanger, the second heat exchanger, the third heat exchanger and the absorber.

[0026] The beneficial effect is that the air-conditioning device can be switched between cooling mode and heating mode, so that the air-conditioning device can choose to cool the indoor environment in a high-temperature environment in summer and heat the indoor environment in a low-temperature environment in winter.

[0027] Preferably, as an implementable embodiment, the air-conditioning device further includes a branch channel, a side passage of the third heat exchanger connected to the second heat exchanger is a first passage, and the other side passage of the third heat exchanger is a second passage; one end of the branch channel is connected to the first passage through a first three-way valve, and the other end of the branch channel is connected to the second passage through a second three-way valve.

[0028] The beneficial effect is that the operation mode of the integrated kitchen waste heat recovery and utilization system can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1A schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system provided by an embodiment of the present invention in a separate hot water preparation mode;

[0031] Figure 2 A schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system provided by an embodiment of the present invention in the single cooling mode;

[0032] Figure 3 A schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system provided by an embodiment of the present invention in a single heating mode;

[0033] Figure 4 A schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system provided by an embodiment of the present invention in hot water and heating dual modes;

[0034] Figure 5 This is a schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system provided by an embodiment of the present invention in hot water and cooling dual modes.

[0035] Description of reference numerals:

[0036] 100-Generator;

[0037] 200-stove;

[0038] 300-cookware;

[0039] 410-water tank; 420-first heat exchanger; 430-water circulation pump;

[0040] 500-solution circulation pump;

[0041] 600-absorber;

[0042] 700- solution side throttle valve;

[0043] 810 - second heat exchanger; 820 - third heat exchanger; 830 - air conditioning side throttle valve; 840 - four-way reversing valve; 850 - branch channel; 860 - three-way valve;

[0044] 900-Ranger hood. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0048] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0049] See also Figure 1-Figure 5 This embodiment provides an integrated kitchen waste heat recovery and utilization system, which includes a waste heat recovery system and a waste heat utilization system; the waste heat recovery system includes a generator 100, which is mounted on the periphery of the stove 200 and is used to absorb the heat generated by the stove 200; the waste heat utilization system is connected to the steam outlet of the generator 100 and is used to transfer the heat in the steam to a water tank 410, indoors or outdoors.

[0050] When the stove 200 is working, the flame will generate heat, part or all of which can be recovered by the generator 100, so that the water in the generator 100 absorbs the heat and heats up to become steam; after the steam enters the waste heat utilization system from the steam outlet of the generator 100, the heat therein can be transferred by the waste heat utilization system to the water tank 410, indoors or outdoors.

[0051] In summer or other environments where the room temperature is already high, the generator 100 recovers the heat from the stove 200, reducing the waste heat directly released into the kitchen. At the same time, by transferring the heat in the steam to the outside, the temperature rise in the kitchen can be reduced, keeping the kitchen cool, thereby reducing the impact of waste heat directly released into the kitchen on the comfort of people in the kitchen. When hot water is needed, the heat in the steam can be transferred to the water tank 410, allowing the water in the water tank 410 to be heated and heated to meet the hot water preparation needs for user use. For example, it can be used to wash kitchen utensils and tableware in the kitchen, thereby reusing waste heat and reducing heat waste. When the indoor temperature is low, the heat in the steam can be transferred indoors to heat the indoor ambient temperature to meet winter heating needs, similarly reusing waste heat and reducing heat waste.

[0052] Preferably, stove 200 may be provided with inner and outer ring fire holes. When cooking is required, the inner ring fire holes can be ventilated. The inner ring fire generated by the inner ring fire holes can be used to heat the pot 300, thereby heating the ingredients within the pot 300 and cooking the food. Simultaneously, the waste heat generated by the inner ring fire during cooking can be used to heat the generator 100, which can then be used to recover the waste heat, achieving full heat utilization. When cooking is not required but hot water or indoor heating is desired, the outer ring fire holes can be ventilated. The outer ring fire generated by the outer ring fire holes can be directly used to heat the generator 100, which absorbs the heat generated by the outer ring fire and transfers it to the water tank 410 or the indoor room via steam to prepare hot water or heat the room. Thus, this embodiment provides an integrated kitchen waste heat recovery and utilization system that not only recovers waste heat generated by cooking but also allows the stove to be used to prepare hot water or heat the room when cooking is not required.

[0053] In the specific structure of the above-mentioned waste heat recovery system, a solution circulation pump 500 and an absorber 600 can be set, and the solution circulation pump 500 is connected between the absorber 600 and the generator 100, so as to utilize the solution circulation pump 500 to drive the solution to circulate between the absorber 600 and the generator 100. At the same time, the above-mentioned waste heat utilization system is connected between the steam outlet of the generator 100 and the absorber 600. The water in the generator 100 absorbs the heat of the stove 200, and after heating up and turning into steam, it can enter the waste heat utilization system. After passing through the waste heat utilization system, the steam originally output by the generator 100 will flow back to the absorber 600 in the form of water or steam and be absorbed by the absorber 600; after the solution in the absorber 600 is diluted by water, it can flow back to the generator 100 under the drive of the solution circulation pump 500, and continue to absorb the heat generated by the stove 200, and circulate back and forth, thereby realizing the recycling of the solution and saving water resources. Specifically, the solution inlet of the solution circulation pump 500 is connected to the lower solution outlet of the absorber 600, the solution outlet of the solution circulation pump 500 is connected to the lower solution inlet of the generator 100, the lower solution outlet of the generator 100 is connected to the upper solution inlet of the absorber 600, and the steam outlet of the generator 100 is opened at the upper part of the generator 100.

[0054] Specifically, a solution-side throttle valve 700 can be connected between the solution outlet of the generator 100 and the solution inlet of the absorber 600, so that the high-concentration solution in the generator 100 can be throttled through the solution-side throttle valve 700, and enter the absorber 600 after cooling and reducing the pressure. It should be noted that the setting of the solution-side throttle valve 700 is conducive to reducing the pressure in the absorber 600, so that the steam originally output by the generator 100 can smoothly flow back to the absorber 600 after passing through the waste heat utilization system.

[0055] The absorption refrigeration cycle can utilize a lithium bromide-water working fluid pair, using a lithium bromide aqueous solution as the working fluid. Specifically, the solution within generator 100 can be a lithium bromide aqueous solution, with water serving as the refrigerant and lithium bromide serving as the absorbent. This lithium bromide-water working fluid pair can operate at room temperature, making it feasible to use water as the refrigerant, while also contributing to energy conservation and environmental protection. The lithium bromide aqueous solution circulates only on the solution side, with a single pipeline: absorber 600 - solution-side circulation pump 500 - generator 100 - solution-side throttle valve 700 - absorber 600. Generator 100 resembles a concave sphere, with the solution at the bottom and steam at the top. Only steam flows to the air conditioning side. Due to the different boiling points of lithium bromide and water, water can function as the refrigerant and lithium bromide as the absorbent. This also prevents lithium bromide from entering the waste heat recovery system.

[0056] See also Figure 1 、 Figure 4 and Figure 5The waste heat utilization system provided in this embodiment may include a hot water preparation device, in which a first heat exchanger 420 and a water circulation pump 430 are provided. The water circulation pump 430 is connected between the water channel of the first heat exchanger 420 and the water tank 410, so as to utilize the water circulation pump 430 to drive water to circulate between the first heat exchanger 420 and the water tank 410; on this basis, the steam channel of the first heat exchanger 420 is connected between the steam outlet of the generator 100 and the absorber 600, so that the steam output from the steam outlet of the generator 100 can first flow into the steam channel of the first heat exchanger 420 and enter the steam channel of the first heat exchanger 420 The steam can exchange heat with the water in the water channel flowing through the first heat exchanger 420. The water in the water channel can heat up after absorbing the heat of the steam in the steam channel. The water in the water tank 410 circulates back and forth to absorb the heat of the steam. After the steam in the steam channel of the first heat exchanger 420 releases heat, it will form high-temperature and high-pressure liquid water, which will eventually flow back to the absorber 600 and be absorbed by the absorber 600. After the solution in the absorber 600 is diluted with water, it will flow back to the generator 100 driven by the solution circulation pump 700. In this way, the reciprocating cycle can realize continuous heating of the water in the water tank 410, so that the water in the water tank 410 is heated up and becomes hot water for users to use.

[0057] Preferably, the water flow direction in the water channel of the first heat exchanger 420 is set to be opposite to the steam flow direction in the steam channel. In this way, the heat exchange efficiency of the first heat exchanger 420 can be improved.

[0058] See also Figure 1 The waste heat utilization system provided in this embodiment may also include an air-conditioning device. The air-conditioning device may include a second heat exchanger 810. The second heat exchanger 810 is connected between the first heat exchanger 420 and the absorber 600, and the second heat exchanger 810 is installed in the range hood 900. In this way, the steam output by the generator 100 can flow to the second heat exchanger 810 after heat exchange and cooling in the first heat exchanger 420. After absorbing the heat of the oil smoke in the range hood 900 and heating it up in the second heat exchanger 810, it flows back to the absorber 600. In this way, the heat in the oil smoke can be recycled, further improving the waste heat utilization rate and reducing heat waste.

[0059] See also Figure 3 and Figure 4 A third heat exchanger 820 can also be provided in the air-conditioning device, and the third heat exchanger 820 is connected between the first heat exchanger 420 and the absorber 600, and the third heat exchanger 820 is placed indoors. In this way, the steam output by the generator 100 is converted into high-temperature and high-pressure liquid water after heat exchange and cooling in the first heat exchanger 420, and can flow to the third heat exchanger 820, and the third heat exchanger 820 releases the heat into the room, thereby realizing the heating function of the indoor environment.

[0060] Furthermore, one side of the third heat exchanger 820 is connected to one side of the second heat exchanger 810 through the air-conditioning side throttle valve 830. Based on this, one of the following two methods can be selected:

[0061] A.See Figure 2 and Figure 5 , connect the other side of the second heat exchanger 810 with the first heat exchanger 420, and connect the other side of the third heat exchanger 820 with the absorber 600. Under this condition, the steam and high-temperature and high-pressure liquid water flowing out of the first heat exchanger 420 can flow through the second heat exchanger 810, the air-conditioning side throttle valve 830 and the third heat exchanger 820 in sequence, and flow back to the absorber 600. In this process, the steam and high-temperature and high-pressure liquid water release heat and cool down when flowing through the second heat exchanger 810, and the heat can be taken out of the room by the range hood 900; the high-temperature and high-pressure liquid water after cooling down flowing out of the second heat exchanger 810 is cooled and reduced in pressure under the throttling effect of the air-conditioning side throttle valve 830. After entering the third heat exchanger 820, it can absorb indoor heat, heat up and phase-change into steam, and flow back to the absorber 600. In this way, the third heat exchanger 820 achieves a cooling effect on the indoor environment.

[0062] B. See Figure 3 and Figure 4 , connect the other side of the second heat exchanger 810 with the absorber 600, and connect the other side of the third heat exchanger 820 with the first heat exchanger 420. Under this condition, the steam and high-temperature and high-pressure liquid water flowing out of the first heat exchanger 420 can flow through the third heat exchanger 820, the air-conditioning side throttle valve 830 and the second heat exchanger 810 in sequence, and flow back to the absorber 600. In this process, the steam and high-temperature and high-pressure liquid water exchange heat with the indoor cold space when flowing through the third heat exchanger 820, thereby achieving the heating function of the indoor environment; the high-temperature and high-pressure liquid water after cooling down flowing out of the third heat exchanger 820 is cooled and reduced in temperature and pressure under the throttling effect of the air-conditioning side throttle valve 830. After entering the second heat exchanger 810, it can absorb the heat of the oil smoke in the range hood 900, heat up and change into steam, and flow back to the absorber 600. In this way, the second heat exchanger 810 realizes the recovery of the heat of the oil smoke.

[0063] Furthermore, a four-way reversing valve 840 can be connected between the hot water preparation device and the air conditioning device, and the four ports of the four-way reversing valve 840 are connected to the first heat exchanger 420, the second heat exchanger 810, the third heat exchanger 820 and the absorber 600 respectively. Under the premise that the above-mentioned branch channel 850 is disconnected, when the four-way reversing valve 840 is adjusted so that the two ends of one channel are respectively opposite to the two ports connected to the first heat exchanger 420 and the second heat exchanger 810, and the two ends of the other channel are respectively opposite to the two ports connected to the third heat exchanger 820 and the absorber 600, the steam and high-temperature and high-pressure liquid water flowing out of the first heat exchanger 420 can flow through the second heat exchanger 810, the air conditioning side throttle valve 830 and the third heat exchanger 820 in sequence, and flow back to the absorber 600, so as to achieve indoor circulation. The cooling function of the indoor environment is realized; when the four-way reversing valve 840 is adjusted so that the two ends of one channel are respectively opposite to the two ports connecting the first heat exchanger 420 and the third heat exchanger 820, and the two ends of the other channel are respectively opposite to the two ports connecting the second heat exchanger 810 and the absorber 600, the steam and high-temperature and high-pressure liquid water flowing out of the first heat exchanger 420 can flow through the third heat exchanger 820, the air-conditioning side throttle valve 830 and the second heat exchanger 810 in sequence, and flow back to the absorber 600, thereby realizing the heating function of the indoor environment. That is to say, the setting of the four-way reversing valve 840 can realize the switching of the air-conditioning device between the cooling mode and the heating mode, so that the air-conditioning device can choose to cool the indoor environment in the high temperature environment in summer and choose to heat the indoor environment in the low temperature environment in winter.

[0064] A branch channel 850 can be provided in the air-conditioning device, and the two ends of the branch channel 850 are respectively connected to the two sides of the third heat exchanger 820 through the three-way valve 860. When the three-way valve 860 is adjusted to conduct the branch channel 850, gaseous water or liquid water will not flow through the third heat exchanger 820, and the third heat exchanger 820 will not exchange heat between the internal water and the indoor environment. At this time, hot water is produced alone or the heat is not utilized; when the three-way valve 860 is adjusted to disconnect the branch channel 850, gaseous water or liquid water can flow through the third heat exchanger 820, and the third heat exchanger 820 is used to realize heat exchange between the internal water and the indoor environment, thereby realizing heating or cooling of the indoor environment, thereby increasing the operating mode of the kitchen waste heat recovery and utilization integrated system.

[0065] The kitchen waste heat recovery and utilization integrated system provided in this embodiment can be operated in any of the following modes:

[0066] Figure 1A schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system provided in this embodiment in a separate hot water preparation mode, wherein the arrows indicate the flow direction of water, steam or solution at the corresponding position; in this mode, the water circulation pump 430 and the solution circulation pump 500 are turned on, the first heat exchanger 420 is used as a condenser, the second heat exchanger 810 is used as an evaporator, the three-way valves 860 at both ends of the branch channel 850 are directly connected, and the first heat exchanger 420 is connected to the second heat exchanger 810 through the branch channel 850 through the four-way reversing valve 840, and the second heat exchanger 810 is connected to the absorber 600. That is, the steam generated by the heating generator 100 enters the first heat exchanger 420, exchanges heat with the water from the water tank 410 and is transformed into high-temperature and high-pressure liquid water. After flowing through the four-way reversing valve 840, the left three-way valve 860, the branch channel 850, and the right three-way valve 860, it is cooled and reduced in pressure by the air-conditioning side throttle valve 830 and enters the second heat exchanger 810. After absorbing heat in the second heat exchanger 810, it is transformed into steam and flows to the absorber 600 through the four-way reversing valve 840. It is absorbed by the high-concentration lithium bromide solution in the generator 100 that has been cooled and reduced in pressure by the solution side throttle valve 700, and then the low-concentration lithium bromide solution in the absorber 600 is pumped into the generator 100 through the solution circulation pump 500 to realize circulation.

[0067] Figure 2 The present invention provides a schematic diagram of the state of the kitchen waste heat recovery and utilization integrated system in the single cooling mode, wherein the arrows indicate the flow direction of water, steam or solution at the corresponding position; in this mode, the water circulation pump 430 is turned off, the solution circulation pump 500 is turned on, the third heat exchanger 820 is used as the evaporator, the second heat exchanger 810 is used as the condenser, the branch channel 850 between the two three-way valves 860 is closed, and the second heat exchanger 810 is connected to the first heat exchanger 420 through the four-way reversing valve 840, and the left three-way valve 860 is connected to the absorber 600. That is, the water vapor generated by the heating generator 100 flows through the first heat exchanger 420 and the four-way reversing valve 840 and then enters the second heat exchanger 810 to release heat. The heat is taken out of the room by the range hood 900. The high-temperature and high-pressure liquid water formed after the heat release phase change in the second heat exchanger 810 is cooled and reduced in pressure under the action of the throttle valve 830 on the air-conditioning side, flows through the right three-way valve 860 and then enters the third heat exchanger 820 to absorb the heat in the room. The refrigerant after absorbing heat changes into water vapor, and then flows through the left three-way valve 860 and the four-way reversing valve 840 and then enters the absorber 600, and is absorbed by the high-concentration lithium bromide solution in the generator 1000 that has been cooled and reduced in pressure by the solution-side throttle valve 700, and then the low-concentration lithium bromide solution in the absorber 600 is pumped into the generator 100 through the solution circulation pump 500 to realize circulation.

[0068] Figure 3The diagram shows the state of the integrated kitchen waste heat recovery and utilization system provided in this embodiment in the separate heating mode, wherein the arrows indicate the flow direction of water, steam or solution at the corresponding position; in this mode, the water circulation pump 430 is turned off, the solution circulation pump 500 is turned on, the third heat exchanger 820 is used as the condenser, the second heat exchanger 810 is used as the evaporator, the branch channel 850 between the two three-way valves 860 is closed, and the second heat exchanger 810 is connected to the absorber 600 through the four-way reversing valve 840, and the left three-way valve 860 is connected to the first heat exchanger 420. That is, the water vapor generated by the heating generator 100 flows through the first heat exchanger 420, the four-way reversing valve 840 and the left three-way valve 860, and then enters the third heat exchanger 820 to release heat to the room. The high-temperature and high-pressure liquid water formed after the heat exchange phase change flows through the right three-way valve 860 and is cooled and reduced in pressure by the air-conditioning side throttle valve 830, and then enters the second heat exchanger 810 to absorb heat. After absorbing heat and changing into water vapor, it flows through the four-way reversing valve 840 and enters the absorber 600, and is absorbed by the high-concentration lithium bromide solution in the generator 100 that has been cooled and reduced in pressure by the solution side throttle valve 700, and then the low-concentration lithium bromide solution in the absorber 600 is pumped into the generator 100 through the solution circulation pump 500 to realize circulation.

[0069] Figure 4 A schematic diagram of the state of the integrated kitchen waste heat recovery and utilization system provided in this embodiment in the dual mode of hot water and heating, wherein the arrows indicate the flow direction of water, steam or solution at the corresponding position; in this mode, the water circulation pump 430 and the solution circulation pump 500 are turned on, the first heat exchanger 420 and the third heat exchanger 820 are used as condensers, the second heat exchanger 810 is used as an evaporator, the branch channel 850 between the two three-way valves 860 is closed, and the first heat exchanger 420 is connected to the left three-way valve 860 through the four-way reversing valve 840, and the second heat exchanger 810 is connected to the absorber 600. That is, the water vapor generated by the heating generator 100 enters the first heat exchanger 420, exchanges heat with the water from the water tank 410 and is transformed into high-temperature and high-pressure liquid water. After flowing through the four-way reversing valve 840 and the left three-way valve 860, it enters the third heat exchanger 820 to exchange heat with the cold air in the room. After the heat exchange, the liquid water refrigerant flows through the right three-way valve 860 and is cooled and reduced in pressure at the throttle valve on the air-conditioning side. Then, it enters the second heat exchanger 810, absorbs heat in the second heat exchanger 810 and is transformed into water vapor. It flows to the absorber 600 through the four-way reversing valve 840 and is absorbed by the high-concentration lithium bromide solution in the generator 100 that has been cooled and reduced in pressure by the solution-side throttle valve 700. The low-concentration lithium bromide solution in the absorber 600 is then pumped into the generator 100 through the solution circulation pump to realize circulation.

[0070] Figure 5A schematic diagram of the state of the integrated kitchen waste heat recovery and utilization system provided in this embodiment in hot water and cooling dual modes, wherein the arrows indicate the flow direction of water, steam or solution at the corresponding position; in this mode, the water circulation pump 430 and the solution circulation pump 500 are turned on, the first heat exchanger 420 and the second heat exchanger 810 are used as condensers, the third heat exchanger 820 is used as an evaporator, the branch channel 850 between the two three-way valves 860 is closed, and the second heat exchanger 810 is connected to the first heat exchanger 420 through the four-way reversing valve 840, and the left three-way valve 860 is connected to the absorber 600. That is, the water vapor generated by the heating generator 100 enters the first heat exchanger 420, exchanges heat with the water from the water tank 410, and is transformed into high-temperature and high-pressure liquid water. After flowing through the four-way reversing valve 840, it enters the second heat exchanger 810 to release heat again, and the heat is taken out of the room by the range hood 900. After releasing heat again, the high-temperature and high-pressure liquid water is cooled and reduced in pressure by the air-conditioning side throttle valve 830, flows through the right three-way valve 860, and enters the third heat exchanger 820 to absorb the heat in the room. After absorbing heat, the refrigerant is transformed into water vapor, and then flows through the left three-way valve 860 and the four-way reversing valve 840 to enter the absorber 600, and is absorbed by the high-concentration lithium bromide solution in the generator 100 that has been cooled and reduced in pressure by the solution side throttle valve 700. Then, the low-concentration lithium bromide solution in the absorber 600 is pumped into the generator 100 through the solution circulation pump 500 to realize circulation.

[0071] When all modes are not required, the water circulation pump 430 and the solution circulation pump 500 are turned off. The water vapor generated by the heating generator 100 can flow through any path to the absorber 600, where it is absorbed by the high-concentration lithium bromide solution in the generator 100, which has been cooled and depressurized by the solution-side throttle valve 700. The refrigerant is ultimately deposited in the absorber 600. When a mode is required, the corresponding pump is turned on to resume circulation. During implementation, the room's heat level can be monitored and controlled by controlling the opening of the solution-side throttle valve and the air conditioning-side throttle valve, as well as the flow rate of the solution circulation pump 500.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A kitchen waste heat recovery and utilization integrated system, characterized in that: Including waste heat recovery system and waste heat utilization system; The waste heat recovery system comprises a generator (100), the generator (100) being arranged on the periphery of the stove (200) and being used to absorb heat generated by the stove (200); the waste heat utilization system being in communication with the steam outlet of the generator (100) and being used to transfer heat in the steam to a water tank (410), indoors or outdoors; The stove (200) has an inner ring fire outlet and an outer ring fire outlet. The inner ring fire generated when the inner ring fire outlet is ventilated is used to heat the pot (300), and the residual heat is used to heat the generator (100); the outer ring fire generated when the outer ring fire outlet is ventilated is used to heat the generator (100); The waste heat recovery system comprises an absorber (600) and an air conditioning device, and a solution-side throttle valve (700) is connected between the solution outlet of the generator (100) and the solution inlet of the absorber (600).

2. The kitchen waste heat recovery and utilization integrated system according to claim 1 is characterized in that: The waste heat utilization system includes a hot water preparation device, which includes a first heat exchanger (420) and a water circulation pump (430). The water circulation pump (430) is connected between the water channel of the first heat exchanger (420) and the water tank (410) and is used to drive water to circulate between the first heat exchanger (420) and the water tank (410); the steam channel of the first heat exchanger (420) is connected to the steam outlet of the generator (100).

3. The kitchen waste heat recovery and utilization integrated system according to claim 2 is characterized in that: The direction of water flow in the water channel is opposite to the direction of steam flow in the steam channel.

4. The kitchen waste heat recovery and utilization integrated system according to claim 2, characterized in that: The waste heat recovery system includes a solution circulation pump (500), which is connected between the absorber (600) and the generator (100) and is used to drive the solution to circulate between the absorber (600) and the generator (100); the first heat exchanger (420) is connected between the steam outlet of the generator (100) and the absorber (600).

5. The kitchen waste heat recovery and utilization integrated system according to claim 4 is characterized in that: The air-conditioning device includes a second heat exchanger (810), the second heat exchanger (810) is connected between the first heat exchanger (420) and the absorber (600), and the second heat exchanger (810) is placed in the range hood (900); and / or, the air-conditioning device includes a third heat exchanger (820), the third heat exchanger (820) is connected between the first heat exchanger (420) and the absorber (600), and the third heat exchanger (820) is placed indoors.

6. The kitchen waste heat recovery and utilization integrated system according to claim 5, characterized in that: One side of the third heat exchanger (820) is connected to one side of the second heat exchanger (810) via an air-conditioning side throttle valve (830); The other side of the second heat exchanger (810) is connected to the first heat exchanger (420), and the other side of the third heat exchanger (820) is connected to the absorber (600); or, the other side of the second heat exchanger (810) is connected to the absorber (600), and the other side of the third heat exchanger (820) is connected to the first heat exchanger (420).

7. The kitchen waste heat recovery and utilization integrated system according to claim 6, characterized in that: A four-way reversing valve (840) is connected between the hot water preparation device and the air conditioning device, and the four ports of the four-way reversing valve (840) are respectively connected to the first heat exchanger (420), the second heat exchanger (810), the third heat exchanger (820) and the absorber (600).

8. The kitchen waste heat recovery and utilization integrated system according to claim 6, characterized in that: The air conditioning device further comprises a branch channel (850), and both ends of the branch channel (850) are respectively connected to both sides of the third heat exchanger (820) via a three-way valve (860).

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