A high-temperature heat pump unit for steam waste heat recovery
By using a high-temperature heat pump unit to recover the medium-temperature secondary steam generated in the laundry room and the heat emitted by the hot rollers, the problem of unused medium-temperature secondary steam is solved, and efficient energy recovery and utilization are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING SOLA SOLAR ENERGY TECH CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-08-04
AI Technical Summary
In the ironing process in places such as laundries, the medium-temperature secondary steam is not effectively utilized, resulting in energy waste.
A high-temperature heat pump unit for steam waste heat recovery is adopted, including a non-powered solar panel and a direct expansion surface cooler. It recovers the heat from medium-temperature secondary steam and the heat dissipated by the hot roller, and combines it with a corrugated tube heat exchanger to preheat the cold water, thereby achieving multi-heat source synergistic recovery.
It significantly improves heat recovery efficiency, reduces energy consumption and waste, and increases energy utilization.
Smart Images
Figure CN224593482U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of waste heat recovery and heat pump technology, specifically, it relates to a high-temperature heat pump unit for steam waste heat recovery. Background Technology
[0002] In industrial production and commercial services (such as laundries, food processing, printing and dyeing, and chemicals), steam is widely used as a highly efficient heat transfer medium. Taking the ironing process in a laundry as an example, saturated steam is typically introduced into metal rollers (i.e., "heat rollers") to heat the wet fabric through heat conduction, thus achieving ironing and shaping. During this process, the steam releases latent heat upon contact with the low-temperature fabric. Some of the steam condenses into condensate, while the uncondensed steam mixes with the evaporated moisture from the fabric, forming "medium-temperature secondary steam" at a temperature of 60-90℃.
[0003] In the ironing process in places such as laundries, steam is usually introduced into the rollers to heat the wet fabric. This process generates medium-temperature secondary steam, which is often directly discharged and not effectively utilized, resulting in significant energy waste.
[0004] In view of this, this utility model is hereby proposed. Utility Model Content
[0005] To address the technical problem of significant energy waste caused by the common practice of heating damp fabrics with steam rollers during ironing in laundries and similar settings, which generates medium-temperature secondary steam that is often directly discharged without effective utilization, the basic concept of this invention is as follows: A high-temperature heat pump unit for steam waste heat recovery includes a non-powered solar cell, which is equipped with a corrugated tube heat exchanger inside. A cold water pipe is connected to one side of the outer wall of the non-powered solar cell, and the cold water pipe is connected to one end of the corrugated tube heat exchanger. The non-powered solar energy system is connected via a pipe to a high-temperature water source heat pump for ironing machine heat recovery and a direct expansion surface cooler. An ironing device is installed below the direct expansion surface cooler. The high-temperature water source heat pump for ironing machine heat recovery is connected to the direct expansion surface cooler.
[0006] In a preferred embodiment of this utility model, a solar preheating water pipe is connected to the other side of the non-powered solar water heater, and a heat storage and hot water exchange tank is connected to the end of the solar preheating water pipe away from the non-powered solar water heater. A high-temperature hot water outlet pipe is connected to the top surface of the heat storage and hot water exchange tank, and a heat exchange coil is installed inside the heat storage and hot water exchange tank.
[0007] In a preferred embodiment of this utility model, the corrugated heat exchanger has a spiral corrugated tube structure to increase the heat exchange contact area between the cold water and the solar thermal medium.
[0008] In a preferred embodiment of this utility model, the heat exchange coil is arranged in a multi-turn spiral pattern inside the heat storage and heat exchange tank to improve the heat exchange efficiency with the preheated water inside the tank.
[0009] In a preferred embodiment of this utility model, the heat exchange surface of the direct expansion surface cooler covers the medium-temperature secondary steam dissipation area of the ironing equipment and the air heat dissipation area around the hot roller.
[0010] In a preferred embodiment of this utility model, a connecting pipe is provided on the heat recovery high-temperature water source heat pump of the ironing machine, and the end of the connecting pipe away from the heat recovery high-temperature water source heat pump of the ironing machine is connected to the ironing equipment. The direct expansion surface cooler is installed inside the connecting pipe.
[0011] Compared with the prior art, the present invention has the following advantages: This invention recovers the heat from the medium-temperature secondary steam generated by the ironing equipment and the heat dissipated into the room by the hot roller through a direct expansion surface cooler. At the same time, it combines the preheating effect of the corrugated tube heat exchanger of the non-powered solar energy to achieve the synergistic recovery of multiple heat sources, including industrial waste heat and solar energy, to maximize the capture of usable heat, significantly improve heat recovery efficiency, and avoid waste of waste heat.
[0012] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description
[0013] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model.
[0014] In the diagram: 1. Non-powered solar energy; 2. Corrugated tube heat exchanger; 3. Cold water pipe; 4. Solar preheating water pipe; 5. Heat storage and heat exchange tank; 6. High-temperature hot water outlet pipe; 7. Heat exchange coil; 8. High-temperature water source heat pump for ironing machine heat recovery; 9. Connecting pipe; 10. Direct expansion surface cooler; 11. Ironing equipment. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.
[0016] like Figures 1 to 2As shown, a high-temperature heat pump unit for steam waste heat recovery includes a non-powered solar cell 1. A corrugated tube heat exchanger 2 is installed inside the non-powered solar cell 1. A cold water pipe 3 is connected to one side of the outer wall of the non-powered solar cell 1, and the cold water pipe 3 is connected to one end of the corrugated tube heat exchanger 2. A high-temperature water source heat pump 8 for ironing machine heat recovery and a direct expansion surface cooler 10 are connected to the non-powered solar cell 1 via pipes. An ironing device 11 is installed below the direct expansion surface cooler 10, and the high-temperature water source heat pump 8 for ironing machine heat recovery is connected to the direct expansion surface cooler 10. A solar preheating water pipe 4 is connected to the other side of the non-powered solar cell 1. A heat storage and hot water exchange tank 5 is connected to the end of the solar preheating water pipe 4 away from the non-powered solar cell 1. A high-temperature hot water outlet pipe 6 is connected to the top surface of the heat storage and hot water exchange tank 5. A heat exchange coil 7 is installed inside the heat storage and hot water exchange tank 5.
[0017] Furthermore, the corrugated heat exchanger 2 has a spiral corrugated structure to increase the heat exchange contact area between the cold water and the solar thermal medium. The heat exchange coil 7 is arranged in a multi-turn spiral pattern inside the heat storage and heat exchange tank 5 to improve the heat exchange efficiency with the preheated water in the tank.
[0018] Furthermore, the heat exchange surface of the direct expansion surface cooler 10 covers the medium-temperature secondary steam emission area of the ironing equipment 11 and the air heat dissipation area around the hot roller, so that the steam generated by the ironing equipment 11 can be fully absorbed, thereby improving the utilization rate.
[0019] Furthermore, a connecting pipe 9 is provided on the heat recovery high-temperature water source heat pump 8 of the ironing machine. The end of the connecting pipe 9 away from the heat recovery high-temperature water source heat pump 8 of the ironing machine is connected to the ironing equipment 11. The direct expansion surface cooler 10 is installed inside the connecting pipe 9.
[0020] The implementation principle of a high-temperature heat pump unit for steam waste heat recovery in this embodiment is as follows: When the ironing equipment in the laundry room is working, steam is introduced into the rollers to heat the wet fabric and generate medium-temperature secondary steam; at the same time, the hot rollers dissipate heat to the indoor air. At this time, the direct expansion surface cooler 10 set above the ironing equipment 11 recovers the heat of the medium-temperature secondary steam on the one hand, and absorbs the heat dissipated into the room by the hot rollers on the other hand, so that the refrigerant evaporates and absorbs heat in the direct expansion surface cooler 10. The refrigerant after absorbing heat enters the high-temperature water source heat pump 8 for heat recovery of the ironing machine. Through compression, condensation and other circulation processes, the heat is increased and pressurized. The heated high-temperature refrigerant is introduced into the heat exchange coil 7 inside the heat storage and heat exchange water tank 5 to heat the water inside the tank. At the same time, cold water enters the corrugated tube heat exchanger 2 of the non-powered solar water heater 1 through the cold water pipe 3, and is preheated by solar energy to form solar preheated water, which then flows into the heat storage and heat exchange water tank 5 through the solar preheated water pipe 4.
[0021] In the solar preheated water of the heat storage and heat exchange tank 5, the high-temperature refrigerant heated by the high-temperature water source heat pump 8 of the ironing machine heat recovery system is further heat-exchanged in the heat exchange coil 7, and finally the high-temperature hot water that meets the demand is obtained. It is output from the high-temperature hot water outlet pipe 6 of the heat storage and heat exchange tank 5 for production or domestic use. At the same time, the high-temperature water source heat pump 8 of the ironing machine heat recovery system introduces the waste heat of the ironing equipment 11 into the system, which synergistically improves the heat recovery efficiency and helps the entire waste heat recovery and hot water preparation process to operate efficiently. In this way, the waste heat of the medium-temperature secondary steam generated by the ironing facility and the heat emitted by the hot roller into the room can be recovered at the same time, which can significantly improve the energy utilization rate and reduce the consumption and waste of energy such as steam.
Claims
1. A high-temperature heat pump unit for steam waste heat recovery, comprising non-powered solar energy (1), characterized in that, The non-powered solar cell (1) is equipped with a corrugated tube heat exchanger (2) inside. A cold water pipe (3) is connected to one side of the outer wall of the non-powered solar cell (1). The cold water pipe (3) is connected to one end of the corrugated tube heat exchanger (2). The non-powered solar energy (1) is connected to a high-temperature water source heat pump (8) for ironing machine heat recovery and a direct expansion surface cooler (10) through a pipeline. An ironing device (11) is set below the direct expansion surface cooler (10). The high-temperature water source heat pump (8) for ironing machine heat recovery is connected to the direct expansion surface cooler (10).
2. A high-temperature heat pump unit for steam waste heat recovery according to claim 1, characterized in that, A solar preheating pipe (4) is connected to the other side of the non-powered solar energy (1). A heat storage and hot water exchange tank (5) is connected to the end of the solar preheating pipe (4) away from the non-powered solar energy (1). A high-temperature hot water outlet pipe (6) is connected to the top surface of the heat storage and hot water exchange tank (5). A heat exchange coil (7) is installed inside the heat storage and hot water exchange tank (5).
3. A high-temperature heat pump unit for steam waste heat recovery according to claim 1, characterized in that, The corrugated heat exchanger (2) has a spiral corrugated tube structure to increase the heat exchange contact area between cold water and solar thermal medium.
4. A high-temperature heat pump unit for steam waste heat recovery according to claim 2, characterized in that, The heat exchange coil (7) is arranged in a multi-ring spiral pattern inside the heat storage and heat exchange tank (5) to improve the heat exchange efficiency with the preheated water in the tank.
5. A high-temperature heat pump unit for steam waste heat recovery according to claim 1, characterized in that, The heat exchange surface of the direct expansion surface cooler (10) covers the medium-temperature secondary steam dissipation area of the ironing device (11) and the air heat dissipation area around the hot roller.
6. A high-temperature heat pump unit for steam waste heat recovery according to claim 1, characterized in that, A connecting pipe (9) is provided on the heat recovery high-temperature water source heat pump (8) of the ironing machine. The end of the connecting pipe (9) away from the heat recovery high-temperature water source heat pump (8) of the ironing machine is connected to the ironing equipment (11). The direct expansion surface cooler (10) is installed inside the connecting pipe (9).