Heat pump heating system, oven and instant water heater

Abstract

The utility model provides a heat pump heating system, an oven and an instant water heater. The heat pump heating system comprises a compressor, a heat pump loop and a vortex tube loop. Through the secondary heating and precise temperature adjusting capacity of the vortex tube in the vortex tube loop, a refrigerant can reach a higher temperature under the condition that the working environment of the compressor is not changed, the energy utilization efficiency is improved, the purposes of energy conservation and environmental protection are achieved, and the problems of high energy consumption and environmental pollution caused by a traditional high-temperature electric heating mode are solved; the system is particularly suitable for high-temperature heating requirements of industrial production, building heating and the like, meanwhile, the stability and reliability of the system are guaranteed, maintenance and operation are easy, an efficient, environment-friendly and convenient high-temperature heating solution is provided for users, and the system is suitable for popularization and application. The system has remarkable advantages in the aspects of improving energy utilization efficiency, adapting to complex working conditions, reducing operation cost, guaranteeing system safety and the like, has wide market application prospects, and meets the requirements of modern industry for environment friendliness, high efficiency and convenience of high-temperature baking.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump heating, in particular to a heat pump heating system, an oven and an instant water heater. Background Art

[0002] With the development of modern industry, the demand for high-temperature baking is constantly expanding, especially in the fields of industrial production, food and drug drying, etc. At present, most industrial heating above 85°C still uses the method of electric heating. However, electric heating has many problems, such as high energy consumption, high operating cost, easy heat runaway, etc.

[0003] In high-temperature working conditions, the main reason for the difficulty in popularizing heat pumps is the limitation of the compressor exhaust temperature. When a traditional heat pump system operates in a high-temperature environment, the exhaust temperature of the compressor is too high, resulting in higher costs for the high-temperature compressor and refrigerant. In addition, too high exhaust pressure will also lead to too high exhaust pressure, increasing the pressure-resistant cost of the whole system. This greatly reduces the economy of the heat pump.

[0004] On the other hand, if the low-temperature waste heat in many places is not recycled and directly discharged into the environment, it will cause thermal pollution to the environment. This waste heat usually comes from cooling water, waste gas, etc. in the industrial production process. If a technology for recycling low-grade waste heat can be developed, it can not only meet the demand for high-temperature heat use, but also reduce the thermal pollution of the environment and realize the recycling of energy.

[0005] Therefore, it is of great significance to develop a new type of high-temperature heat pump system. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a heat pump heating system, an oven and an instant water heater with reasonable structure, high working efficiency and low energy consumption.

[0007] To solve the above technical problem, the technical solution adopted by the utility model is: a heat pump heating system, including a compressor, a heat pump circuit and a vortex tube circuit, the outlet end of the compressor is respectively connected with the inlet end of the heat pump circuit and the inlet end of the vortex tube circuit;

[0008] The heat pump circuit includes a first condensing device, a first expansion valve and an evaporator, the outlet end of the first condensing device is connected with the inlet end of the first expansion valve, the outlet end of the first expansion valve is connected with the inlet end of the evaporator, and the outlet end of the evaporator is connected with the inlet end of the compressor;

[0009] The vortex tube circuit includes a vortex tube, a second condensation device, a second expansion valve, and a throttling device. The vortex tube includes a hot end outlet and a cold end outlet. The hot end outlet is connected to the inlet end of the second condensation device. The outlet end of the second condensation device is connected to the inlet end of the second expansion valve. The outlet end of the second expansion valve is connected to the outlet end of the evaporator. The cold end outlet is connected to the inlet end of the throttling device. The outlet end of the throttling device is connected to the inlet end of the second expansion valve. The outlet end of the second expansion valve is connected to the outlet end of the evaporator.

[0010] Further, both the first expansion valve and the second expansion valve are electronic expansion valves.

[0011] Further, a controller is further included, and the controller is electrically connected to the compressor, the first expansion valve, and the second expansion valve respectively.

[0012] Further, the throttling device is a capillary tube.

[0013] Further, the outlet end of the compressor is connected to the inlet end of the heat pump circuit and the inlet end of the vortex tube circuit respectively through a shunt pipeline; the outlet end of the throttling device is connected to the inlet end of the second expansion valve through a first confluence pipeline; the outlet end of the second expansion valve is connected to the outlet end of the evaporator through a second confluence pipeline.

[0014] Further, the shunt pipeline, the first confluence pipeline, and the second confluence pipeline are all Y-shaped tees, pant-shaped tees, or straight tees.

[0015] The present utility model also relates to an oven, including the heat pump heating system as described in any one of the above.

[0016] Further, a box body is included. The box body includes a first cavity and a second cavity. An air return opening and an air supply opening are provided between the first cavity and the second cavity. The first condensation device and the second condensation device of the heat pump heating system are both arranged in the first cavity. An air return fan is provided at the air return opening, and the air return fan is used to convey the air in the second cavity to the first cavity; an air supply fan is provided at the air supply opening, and the air supply fan is used to convey the heated air in the first cavity to the second cavity. Both the first condensation device and the second condensation device are finned heat exchangers.

[0017] The present utility model also relates to an instant water heater, including the heat pump heating system as described in any one of the above.

[0018] Further, a heating water pipe is included. The heating water pipe passes through the first condensation device and the second condensation device in sequence. Both the first condensation device and the second condensation device are plate-type or shell-type heat exchangers.

[0019] The beneficial effects of the present utility model are as follows: A heat pump heating system is provided, including a compressor, a heat pump circuit, and a vortex tube circuit. Through the secondary heating of the vortex tube in the vortex tube circuit and its precise temperature regulation ability, the refrigerant can reach a higher temperature under the condition that the output refrigerant temperature and pressure of the compressor remain unchanged, improving the energy utilization efficiency, achieving the goal of energy conservation and environmental protection, avoiding the high energy consumption and environmental pollution problems of traditional high-temperature heating methods, and being particularly suitable for high-temperature electric heating requirements such as industrial production and building heating. At the same time, the stability and reliability of the system are also guaranteed, making it easy to maintain and operate, providing users with an efficient, environmentally friendly, and convenient high-temperature heating solution. This system has significant advantages in improving energy utilization efficiency, adapting to complex working conditions, reducing operating costs, and ensuring system safety, and has a broad market application prospect, meeting the environmental protection, high efficiency, and convenience requirements of modern industry for high-temperature baking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific structure of the present utility model will be described in detail below with reference to the drawings:

[0021] Figure 1 is the system block diagram of the heat pump heating system of the present utility model;

[0022] Figure 2 is the structural schematic diagram of the oven of the present utility model;

[0023] Figure 3 is the structural schematic diagram of the water heater of the present utility model;

[0024] 1 - Compressor; 2 - First condensing device; 3 - First expansion valve; 4 - Evaporator; 5 - Vortex tube; 6 - Second condensing device; 7 - Second expansion valve; 8 - Throttling device; 9 - Controller;

[0025] 11 - First cavity; 12 - Second cavity; 13 - Return air fan; 14 - Supply air fan;

[0026] 21 - Heating water pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0030] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0033] Embodiment 1

[0034] Please refer to Figure 1 , this embodiment provides a heat pump heating system, including a compressor 1, a heat pump circuit, and a vortex tube circuit. The outlet end of the compressor 1 is respectively connected to the inlet end of the heat pump circuit and the inlet end of the vortex tube circuit;

[0035] The heat pump circuit includes a first condensation device 2, a first expansion valve 3, and an evaporator 4. The outlet end of the first condensation device 2 is connected to the inlet end of the first expansion valve 3. The outlet end of the first expansion valve 3 is connected to the inlet end of the evaporator 4. The outlet end of the evaporator 4 is connected to the inlet end of the compressor 1;

[0036] The vortex tube circuit includes a vortex tube 5, a second condensation device 6, a second expansion valve 7, and a throttling device 8. The vortex tube 5 includes a hot end outlet and a cold end outlet. The hot end outlet is connected to the inlet end of the second condensation device 6. The outlet end of the second condensation device 6 is connected to the inlet end of the second expansion valve 7. The outlet end of the second expansion valve 7 is connected to the outlet end of the evaporator 4. The cold end outlet is connected to the inlet end of the throttling device 8. The outlet end of the throttling device 8 is connected to the inlet end of the second expansion valve 7. The outlet end of the second expansion valve 7 is connected to the outlet end of the evaporator 4.

[0037] In this embodiment, by arranging a vortex tube circuit in parallel on the heat pump circuit, the energy utilization efficiency is improved.

[0038] Specifically, the outlet end of the compressor 1 is connected to the inlet end of the shunt pipeline. One outlet end of the shunt pipeline is connected to the inlet end of the heat pump circuit. The other outlet end of the shunt pipeline is connected to the inlet end of the vortex tube circuit. The outlet end of the heat pump circuit is connected to one inlet end of the first confluence pipeline. The outlet end of the vortex tube circuit is connected to the other inlet end of the first confluence pipeline. The outlet end of the first confluence pipeline is connected to the inlet end of the compressor.

[0039] The heat pump circuit includes a first condensing device 2, a first expansion valve 3, and an evaporator 4. The inlet end of the first condensing device 2 is the inlet end of the heat pump circuit. The outlet end of the first condensing device 2 is connected to the inlet end of the first expansion valve 3. The outlet end of the first expansion valve 3 is connected to the inlet end of the evaporator 4. The outlet end of the evaporator 4 is the outlet end of the heat pump circuit.

[0040] The vortex tube circuit includes a vortex tube 5, a second condensing device 6, a second expansion valve 7, and a throttling device 8. The inlet end of the vortex tube 5 is the inlet end of the vortex tube circuit. The hot end outlet of the vortex tube 5 is connected to the inlet end of the second condensing device 6. The outlet end of the second condensing device 6 is connected to one inlet end of a second confluence pipeline. The outlet end of the second confluence pipeline is connected to the inlet end of the second expansion valve 7. The outlet end of the second expansion valve 7 is the outlet end of the vortex tube circuit. The cold end outlet of the vortex tube 5 is connected to the inlet end of the throttling device 8. The outlet end of the throttling device is connected to the other inlet end of the second confluence pipeline.

[0041] Among them, the shunt pipeline, the first confluence pipeline, and the second confluence pipeline include but are not limited to Y-shaped tees, pants-shaped tees, or straight tees.

[0042] The heat pump heating system of this embodiment can make the system more effectively utilize the heat generated by the heat pump circuit through the secondary heating of the vortex tube 5, reduce energy loss. At the same time, after the refrigerant of the vortex tube 5 is subjected to cold and heat separation, the secondary condenser 6 can reach a higher temperature, improving the overall heat conversion efficiency, significantly reducing energy consumption, reducing greenhouse gas emissions, and contributing to the realization of green and low-carbon energy utilization.

[0043] During operation, the compressor 1 operates to suck in and compress the low-temperature and low-pressure gaseous refrigerant, thereby increasing the temperature and pressure of the refrigerant. The high-temperature and high-pressure gaseous refrigerant is respectively transported to the heat pump circuit and the vortex tube circuit through the shunt pipeline. The compressor is internally provided with a gas-liquid separation tank, which can prevent liquid from entering the compressor cylinder and damaging the compressor.

[0044] When the high-temperature and high-pressure gaseous refrigerant entering the heat pump circuit passes through the first condensing device 2, while the high-temperature and high-pressure gaseous refrigerant is condensing, its heat is directly dissipated into the heated space through the first condensing device 2. After the heat is released, the refrigerant then enters the first expansion valve 3. In the first expansion valve 3, the refrigerant is depressurized to a low-pressure liquid refrigerant. Subsequently, the low-pressure liquid refrigerant enters the evaporator 4 and vaporizes into a low-pressure gaseous refrigerant after absorbing heat in the evaporator 4, and finally is transported to the inlet end of the compressor 1. The heat dissipation efficiency of the first condensing device 2 can be increased by a fan, and at the same time, the heat can also be transferred to the heated object through other heat conduction fittings.

[0045] The high-temperature and high-pressure gaseous refrigerant entering the vortex tube circuit is further divided in the vortex tube 5. While generating a temperature difference in the vortex tube 5, the cold and hot gaseous refrigerants are separated and discharged from the cold end outlet and the hot end outlet respectively.

[0046] The high-temperature gaseous refrigerant is output to the second condensing device 6 through the hot end outlet. When passing through the second condensing device 6, while the high-temperature gaseous refrigerant is being condensed, its heat is directly dissipated into the heated space through the second condensing device 6. The refrigerant after heat release is then transported to the second confluence pipeline. The heat dissipation efficiency of the second condensing device 6 can be increased by a fan, and at the same time, the heat can also be transferred to the heated object through other heat conduction fittings.

[0047] The refrigerant output from the cold end outlet passes through the throttling device 8 and converges with the refrigerant after heat release in the second confluence pipeline, and then is transported to the second expansion valve 7 together.

[0048] The throttling device 8 can be used to adjust the pressure difference between the hot end outlet and the cold end outlet of the vortex tube 5. Preferably, the throttling device 8 is a capillary tube. Among them, the diameter and length of the capillary tube are determined by the magnitude of its pressure drop. Its pressure drop is consistent with the calculated value of the pressure drop between the hot end outlet of the vortex tube 5 and the second expansion valve 7. After this design, the pressures at the hot end outlet and the cold end outlet of the vortex tube 5 are consistent with the designed outlet pressure, so as to achieve the effect of adjusting the pressure difference.

[0049] The combined gaseous refrigerant is depressurized by the second expansion valve 7 and then transported to the first confluence pipeline to converge with the gaseous refrigerant at the outlet end of the evaporator 4. Finally, it enters the compressor 1 from the inlet end of the compressor 1 and is compressed again into a high-temperature and high-pressure gaseous refrigerant to continue participating in the heating cycle. In order to increase the heat absorption efficiency of the evaporator 4, a fan can be equipped for the evaporator to increase the air flow and accelerate the heat exchange efficiency of the evaporator.

[0050] In order to adjust the pressure of the refrigerant entering the vortex tube circuit so that the vortex tube 5 can work within the optimal pressure difference range. It also includes a controller 9, and the controller 9 is electrically connected to the compressor 1, the first expansion valve 3, and the second expansion valve 7 respectively. The first expansion valve 3 and the second expansion valve 7 are both electronic expansion valves, and the compressor 1 is a fixed-frequency compressor.

[0051] The controller 9 can control the start and stop of the fixed-frequency compressor, and at the same time, it can also control the opening and closing degrees of the first expansion valve 3 and the second expansion valve 7.

[0052] During operation, the controller 9 adjusts the opening and closing ratios of the two expansion valves according to the total pressure of the system, thereby adjusting the pressure of the refrigerant entering the vortex tube circuit, keeping the pressure of the refrigerant near the optimal inlet pressure range of the vortex tube 5, achieving fine temperature regulation, meeting the heating requirements of the system under different working conditions, and being particularly suitable for occasions where precise temperature control is required.

[0053] The mechanical structure adopted in the whole system is less, ensuring the stable operation of the system under various working conditions and effectively reducing the failure rate.

[0054] As can be seen from the above description, the beneficial effects of the present utility model are as follows: A heat pump heating system is provided, including a compressor, a heat pump circuit and a vortex tube circuit. Through the secondary heating of the vortex tube in the vortex tube circuit and the precise temperature regulation ability, the refrigerant can reach a higher temperature under the condition that the output temperature and pressure of the compressor remain unchanged, improving the energy utilization efficiency, achieving the goal of energy conservation and environmental protection, avoiding the high energy consumption and environmental pollution problems of traditional high-temperature heating methods, and being particularly suitable for high-temperature electric heating requirements such as industrial production and building heating. At the same time, the stability and reliability of the system are also guaranteed, and it is easy to maintain and operate, providing users with an efficient, environmentally friendly and convenient high-temperature heating solution. The system has significant advantages in improving energy utilization efficiency, adapting to complex working conditions, reducing operating costs and ensuring system safety, and has a wide market application prospect, meeting the environmental protection, high efficiency and convenience requirements of modern industry for high-temperature baking.

[0055] Embodiment 2

[0056] Please refer to Figure 2 , the present utility model also relates to an oven, including the heat pump heating system as described in Embodiment 1 above.

[0057] Specifically, it includes a box body, the box body includes a first cavity 11 and a second cavity 12, there are an air return port and an air supply port between the first cavity 11 and the second cavity 12, the first condensing device 3 and the second condensing device 7 of the heat pump heating system are both arranged in the first cavity 11, the air return port is provided with an air return fan 13, and the air return fan 13 is used to convey the air in the second cavity 12 to the first cavity 11; the air supply port is provided with an air supply fan 14, and the air supply fan 14 is used to convey the heated air in the first cavity 11 to the second cavity 12, and both the first condensing device 3 and the second condensing device 7 are finned heat exchangers.

[0058] In this embodiment, the oven adopts a closed heating method, and both the first condensing device 3 and the second condensing device 7 are finned heat exchangers. Using finned heat exchangers can increase the contact area with air and increase the heat exchange efficiency.

[0059] The first condensation device 3 and the second condensation device 7 are arranged in the first cavity 11 of the box body. The air in the second cavity 12 is drawn into the first cavity 11 by the return air fan 13 and is preliminarily heated by the first condensation device 3. After being heated to the required temperature by the second condensation device 7, it is finally drawn into the second cavity 12 by the supply air fan 14, thus forming a hot air circulation to realize the heating of the object in the second cavity 12.

[0060] Embodiment 3

[0061] Please refer to Figure 3 , the present utility model also relates to an instant water heater, including the heat pump heating system as described in the above Embodiment 1.

[0062] Specifically, it includes a heating water pipe 21, and the heating water pipe 21 sequentially passes through the first condensation device 3 and the second condensation device 7. Both the first condensation device 3 and the second condensation device 7 are plate-type or shell-and-tube heat exchangers.

[0063] In this embodiment, both the first condensation device 3 and the second condensation device 7 are plate-type or shell-and-tube heat exchangers. The heating water pipe 21 sequentially passes through the first condensation device 3 and the second condensation device 7, is preliminarily heated by the first condensation device 3, and after being heated to the required temperature by the second condensation device 7, flows out from the output end of the heating water pipe 21 to realize the efficient heating of water.

[0064] It is easily understood by those skilled in the art that on the premise of no conflict, the above embodiments can be freely combined and superimposed.

[0065] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A heat pump heating system, characterized in that: It comprises a compressor, a heat pump circuit and a vortex tube circuit, wherein the outlet end of the compressor is connected to the inlet end of the heat pump circuit and the inlet end of the vortex tube circuit respectively; The heat pump circuit comprises a first condensing device, a first expansion valve and an evaporator, wherein the outlet end of the first condensing device is connected to the inlet end of the first expansion valve, the outlet end of the first expansion valve is connected to the inlet end of the evaporator, and the outlet end of the evaporator is connected to the inlet end of the compressor; The vortex tube circuit includes a vortex tube, a second condensing device, a second expansion valve and a throttling device. The vortex tube includes a hot end outlet and a cold end outlet. The hot end outlet is connected to the inlet end of the second condensing device, the outlet end of the second condensing device is connected to the inlet end of the second expansion valve, the outlet end of the second expansion valve is connected to the outlet end of the evaporator, the cold end outlet is connected to the inlet end of the throttling device, and the outlet end of the throttling device is connected to the inlet end of the second expansion valve.

2. The heat pump heating system according to claim 1, characterized in that: The first expansion valve and the second expansion valve are both electronic expansion valves.

3. The heat pump heating system according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the compressor, the first expansion valve and the second expansion valve respectively.

4. The heat pump heating system according to claim 1, characterized in that: The throttling device is a capillary tube.

5. The heat pump heating system according to claim 1, characterized in that: The outlet end of the compressor is connected to the inlet end of the heat pump circuit and the inlet end of the vortex tube circuit respectively through bypass pipelines; the outlet end of the throttling device is connected to the inlet end of the second expansion valve through a first converging pipeline; the outlet end of the second expansion valve is connected to the outlet end of the evaporator through a second converging pipeline.

6. The heat pump heating system according to claim 5, characterized in that: The flow-dividing pipeline, the first converging pipeline and the second converging pipeline are all Y-shaped tees, trouser-shaped tees or straight tees.

7. An oven, characterized in that: It comprises a heat pump heating system as described in any one of claims 1 to 6.

8. The oven according to claim 7, characterized in that: The heat pump heating system comprises a box body, which comprises a first cavity and a second cavity, a return air inlet and an air supply inlet are provided between the first cavity and the second cavity, a first condensing device and a second condensing device of the heat pump heating system are both arranged in the first cavity, a return air inlet is provided with a return air fan, and the return air fan is used to transport the air in the second cavity to the first cavity; the air supply inlet is provided with a supply air fan, and the supply air fan is used to transport the heated air in the first cavity to the second cavity, and the first condensing device and the second condensing device are both fin heat exchangers.

9. An instant water heater, characterized in that: It comprises a heat pump heating system as described in any one of claims 1 to 6.

10. The instant water heater according to claim 9, characterized in that: It comprises a heating water pipe, which passes through the first condensing device and the second condensing device in sequence, and the first condensing device and the second condensing device are both plate-type or shell-type heat exchangers.

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