A heat pump vapor system

Abstract

The utility model relates to heat pump manufacturing technical field, propose a kind of heat pump steam system, system includes heat pump steam unit, vapor-liquid co-transportation system and water replenishing system;Vapor-liquid co-transportation system is connected with heat pump steam unit, and water replenishing system is connected with vapor-liquid co-transportation system;Wherein, heat pump steam unit includes condenser, and vapor-liquid co-transportation system includes vapor-liquid co-transportation pipe and energy storage tank;Vapor-liquid co-transportation pipe both ends are connected condenser and energy storage tank respectively;Vapor-liquid co-transportation pipe upper portion transports steam, lower portion transports high-temperature hot water.The utility model sets up energy storage tank, transports steam in upper portion and transports liquid in lower portion in the same pipeline, solve the problem that steam quality is difficult to guarantee due to heat loss and condensation loss.

Description

Technical Field

[0001] This utility model relates to the field of heat pump manufacturing technology, and in particular to a heat pump steam system. Background Technology

[0002] In today's high-quality development of the heat pump industry, heat pump steam units, as an important branch of heat pump technology, can efficiently upgrade low-grade heat energy into high-temperature steam required by industry, playing an important role in process heating, drying and waste heat recovery.

[0003] However, direct expansion evaporation for steam generation, a common technology in small heat pump steam systems, is mainly used in short-distance steam transport scenarios. Although this system transports steam over short distances, changes in the outdoor environment cause fluctuations in heat loss, making it difficult to guarantee steam quality. Even with insulation, current systems cannot completely avoid the impact of environmental changes. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a heat pump steam system. This system constructs a steam-liquid co-transportation heat pump steam system, installs an energy storage tank in the system, and utilizes a method of transporting steam from the upper part and liquid from the lower part in the same pipeline to achieve real-time reheating of the transported steam, thereby solving the problem of difficulty in guaranteeing steam quality due to heat loss and condensation loss.

[0005] The solution adopted in this utility model is as follows: A heat pump steam system includes a heat pump steam unit, a steam-liquid co-transmission system, and a water supply system; the steam-liquid co-transmission system is connected to the heat pump steam unit, and the water supply system is connected to the steam-liquid co-transmission system. The heat pump steam unit includes a condenser, and the steam-liquid co-transmission system includes a steam-liquid co-transmission pipe and an energy storage tank; the two ends of the steam-liquid co-transmission pipe are respectively connected to the condenser and the energy storage tank; the upper part of the steam-liquid co-transmission pipe transports steam, and the lower part transports high-temperature hot water.

[0006] Furthermore, the heat pump steam unit also includes a compressor, a liquid receiver, and an electronic expansion valve; the outlet end of the compressor is connected to the inlet end of the condenser; the outlet end of the condenser is connected to the inlet end of the electronic expansion valve through the liquid receiver.

[0007] Furthermore, the heat pump steam unit also includes an evaporator; a gas-liquid separator is provided between the evaporator and the compressor, and the outlet end of the evaporator is connected to the inlet end of the compressor through the gas-liquid separator.

[0008] Furthermore, the gas-liquid co-transport system also includes a liquid delivery pipe; the liquid delivery pipe is connected to an energy storage tank and a condenser at the bottom.

[0009] Furthermore, a variable frequency water pump is installed on the liquid delivery pipe.

[0010] Furthermore, the water replenishment system includes a steam water replenishment pump, which is connected to the inlet end of the energy storage tank.

[0011] Furthermore, a shut-off valve is provided on the water supply pipeline used to connect the steam water supply pump and the energy storage tank.

[0012] Furthermore, the water replenishment system also includes a level monitor, which is installed in the energy storage tank.

[0013] Furthermore, the outer side of the gas-liquid transmission pipe is provided with a heat insulation layer, and a high-temperature sealing joint is provided at the interface.

[0014] Furthermore, the energy storage tank is equipped with a steam delivery outlet, and a pressure sensor and a regulating valve are installed at the outlet.

[0015] The beneficial effects of this utility model are as follows: This invention is applicable to small heat pump steam systems. It utilizes a steam-liquid co-transmission pipeline heat pump steam system to achieve steam transmission at the top and liquid transmission at the bottom of the same pipeline, ensuring steam quality during transmission, reducing energy loss during transmission, and saving water pump energy consumption. By using an energy storage tank, not only can a certain amount of steam be supplemented through the flash principle, but also hot water generated by the condenser can be stored, reducing energy waste.

[0016] Advantages of the present invention in additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is a schematic diagram of the heat pump steam system structure in an embodiment of this utility model.

[0019] In the diagram, 1. Compressor; 2. Condenser; 3. Liquid receiver; 4. Electronic expansion valve; 5. Evaporator; 6. Gas-liquid separator; 7. Gas-liquid transfer pipe; 8. Energy storage tank; 9. Liquid transfer pipe; 10. Variable frequency water pump; 11. Steam makeup water pump; 12. Shut-off valve; 13. Liquid level monitor. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this utility model.

[0022] This embodiment provides a heat pump steam system, including a heat pump steam unit, a steam-liquid co-transmission system, and a water makeup system. The steam-liquid co-transmission system is connected to the heat pump steam unit, and the water makeup system is connected to the steam-liquid co-transmission system. Specifically: The heat pump steam unit includes a compressor 1, a condenser 2, a receiver 3, and an electronic expansion valve 4. The outlet of the compressor 1 is connected to the inlet of the condenser 2; the outlet of the condenser 2 is connected to the inlet of the electronic expansion valve 4 through the receiver 3. The heat pump steam unit also includes an evaporator 5; a gas-liquid separator is installed between the evaporator 5 and the compressor 1, and the outlet of the evaporator 5 is connected to the inlet of the compressor 1 through the gas-liquid separator 6.

[0023] In a heat pump steam unit, the compressor 1 can be a scroll, piston, screw, or centrifugal type; the condenser 2 can be a plate heat exchanger, shell-and-tube heat exchanger, or plate-and-shell heat exchanger; the evaporator 5 is used for heat absorption and evaporation of the working fluid, and can be selected as a copper tube finned or plate heat exchanger depending on the system capacity; the electronic expansion valve 4 is used to regulate the refrigerant flow rate in the system to achieve precise control of the superheat of the evaporator 5.

[0024] The vapor-liquid co-transport system includes a vapor-liquid co-transport pipe 7, an energy storage tank 8, a liquid delivery pipe 9, and a variable frequency water pump 10 (variable flow rate water pump). The vapor-liquid co-transport pipe 7 is connected to the condenser 2 and the energy storage tank 8 at both ends, respectively. Steam is transported at the top of the pipe, and high-temperature hot water is transported at the bottom. The liquid delivery pipe 9 is connected to the energy storage tank 8 and the condenser 2 at the bottom, and the variable frequency water pump 10 is installed on the liquid delivery pipe 9.

[0025] In the vapor-liquid co-transport system, the hot water transported by the vapor-liquid co-transport pipe 7 serves to heat the steam, reducing the risk of steam condensation. The pipe of the vapor-liquid co-transport pipe 7 can be made of stainless steel, galvanized steel, or composite metal materials. The interfaces of the vapor-liquid co-transport pipe 7 can achieve gas-liquid isolation and sealing through high-temperature sealing joints, such as metal corrugated pipes with compression fittings, flange connections with high-temperature sealing gaskets, or dual-channel coaxial sealing interfaces. The vapor-liquid co-transport pipe 7 has an insulation layer on the outside, which can be made of polyurethane foam, rubber-plastic foam, or aluminum silicate cotton, etc., to reduce heat loss. The energy storage tank 8 can be made of stainless steel or carbon steel, with a steam delivery outlet, and a pressure sensor and regulating valve installed at the outlet. The liquid delivery pipe 9 can be made of stainless steel, copper pipe, galvanized steel, or composite metal materials. The variable frequency water pump 10 can be a centrifugal pump, magnetic pump, etc.

[0026] The water replenishment system includes a steam water replenishment pump 11, a shut-off valve 12, and a liquid level monitor 13. The steam water replenishment pump 11 is connected to the inlet end of the bottom of the energy storage tank 8, the shut-off valve 12 is installed on the water replenishment pipeline used to connect the steam water replenishment pump 11 and the energy storage tank 8, and the liquid level monitor 13 is installed in the energy storage tank 8.

[0027] In the water replenishment system, the steam water replenishment pump 11 is used to automatically replenish water during system operation, the shut-off valve 12 is used to close and isolate the water replenishment pipeline during system maintenance or repair, and the liquid level monitor 13 is used to monitor liquid level changes in real time.

[0028] In this embodiment, the working principle of the heat pump steam system is as follows: The working principle includes the refrigerant operation process in the heat pump steam unit, the hot water operation process in the steam-liquid combined transport system, the steam operation process in the steam-liquid combined transport system, and the operation process of the water replenishment system.

[0029] The refrigerant operation process in a heat pump steam unit is as follows: the refrigerant is drawn into the compressor as low-pressure vapor, and after compression, it becomes a high-temperature and high-pressure gas. It then enters the condenser to release heat and condense into a high-pressure liquid. The condensed high-pressure liquid flows into the liquid receiver for storage, and after being throttled by the electronic expansion valve, it becomes a low-temperature and low-pressure wet vapor. It then enters the evaporator to absorb heat and evaporate into low-pressure vapor. After evaporation, the refrigerant returns to the compressor after the entrained liquid is removed by the gas-liquid separator.

[0030] The hot water operation process in the vapor-liquid co-transport system is as follows: under the pressure of the variable frequency water pump, the hot water enters the storage tank from the condenser through the lower part of the vapor-liquid co-transport pipe; the hot water is stored in the storage tank; the hot water returns to the condenser from the storage tank through the liquid delivery pipe; and so on in a cycle.

[0031] The steam operation process in the vapor-liquid co-transport system is as follows: steam is produced in the condenser and enters the upper part of the energy storage tank through the upper part of the vapor-liquid co-transport pipe; the energy storage tank supplies the user side, and some flash steam is generated in the energy storage tank using the flash principle for user use.

[0032] The operation process of the water replenishment system is as follows: the inlet of the steam water replenishment end is connected to the inlet of the energy storage tank through the steam water replenishment pump and the shut-off valve.

[0033] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A heat pump steam system, characterized in that, It includes a heat pump steam unit, a steam-liquid co-transmission system, and a water supply system; the steam-liquid co-transmission system is connected to the heat pump steam unit, and the water supply system is connected to the steam-liquid co-transmission system. The heat pump steam unit includes a condenser, and the steam-liquid co-transmission system includes a steam-liquid co-transmission pipe and an energy storage tank; the two ends of the steam-liquid co-transmission pipe are respectively connected to the condenser and the energy storage tank; the upper part of the steam-liquid co-transmission pipe transports steam, and the lower part transports high-temperature hot water.

2. The heat pump steam system as described in claim 1, characterized in that, The heat pump steam unit also includes a compressor, a liquid receiver, and an electronic expansion valve; the outlet end of the compressor is connected to the inlet end of the condenser; the outlet end of the condenser is connected to the inlet end of the electronic expansion valve through the liquid receiver.

3. A heat pump steam system as described in claim 2, characterized in that, The heat pump steam unit also includes an evaporator; a gas-liquid separator is provided between the evaporator and the compressor, and the outlet end of the evaporator is connected to the inlet end of the compressor through the gas-liquid separator.

4. A heat pump steam system as described in claim 1, characterized in that, The gas-liquid co-transport system also includes a liquid delivery pipe; the liquid delivery pipe is connected to an energy storage tank and a condenser at the bottom.

5. A heat pump steam system as described in claim 4, characterized in that, A variable frequency water pump is installed on the liquid delivery pipe.

6. A heat pump steam system as described in claim 1, characterized in that, The water replenishment system includes a steam water replenishment pump, which is connected to the inlet end of the energy storage tank.

7. A heat pump steam system as described in claim 6, characterized in that, A shut-off valve is installed on the water supply pipeline used to connect the steam water supply pump and the energy storage tank.

8. A heat pump steam system as described in claim 1, characterized in that, The water replenishment system also includes a level monitor, which is installed in the energy storage tank.

9. A heat pump steam system as described in claim 1, characterized in that, The outer side of the gas-liquid transmission pipe is equipped with a heat insulation layer, and a high-temperature sealing joint is installed at the interface.

10. A heat pump steam system as described in claim 1, characterized in that, The energy storage tank is equipped with a steam delivery outlet, and a pressure sensor and a regulating valve are installed at the outlet.

Images