TWM445687U - Heat exchange device - Google Patents

Description

Heat exchange device

The present invention is a heat exchange device which can be used in a heat pump type water heater system that uses a compressor and a heat source medium (refrigerant medium) to take heat, and can effectively absorb the latent heat and sensible heat of the heat source medium during heat exchange, thereby increasing the water temperature. save energy.

According to the working principle of the heat pump water heater, the heat source medium (ie, the refrigerant) is used to collect the heat energy in the air, and after being stored and stored by the heat pump (ie, the compressor), the heat source medium is exchanged with the cold water through the heat exchanger. The cold water is gradually warmed and converted into hot water. Since the heat pump water heater converts cold water into hot water, it uses the operating refrigerant to do energy conversion. The energy conversion efficiency can theoretically exceed 300%, which is less than the limit of 100% of the power or fire conversion efficiency. The heat pump water heater can achieve good heating effect with only a small amount of electric energy. It not only has significant economic benefits, but also produces little pollution. It is the most environmentally friendly and energy-efficient heating equipment.

As shown in the first figure, the existing heat pump water heater system includes a compressor 1, a heat exchanger 2, an expansion valve 3, and an evaporator 4. In operation, the compressor 1 compresses the refrigerant into a high temperature and high pressure. The gaseous refrigerant enters the heat exchanger 2 with the high-temperature and high-pressure gaseous refrigerant as a heat source medium, and exchanges heat with the water stream in the heat exchanger 2 to release heat energy, so that the water flow can be heated and heated, and the high-temperature and high-pressure gas refrigerant is simultaneously heated. After condensing by releasing heat energy and passing through the high and low pressure difference of the expansion valve 3 (or capillary tube) to become a gas-liquid mixed refrigerant, the external heat source is absorbed by the evaporator 4, and the refrigerant is compressed into a high-temperature and high-pressure gas state through the compressor 1. The refrigerant enters the heat exchanger 2, and the circulation is continuously performed as a thermal energy transfer operation, that is, the water flow can be heated and heated in the heat exchanger 2.

It can be seen from the above process that the operation process of the heat exchange of the heat pump water heater is roughly The high temperature and high pressure gaseous refrigerant condenses in the heat exchanger, and then is compressed by the compressor into a high temperature gas state for the next heat exchange. In the process of storing heat in the refrigerant, the total heat energy includes latent heat and sensible heat, but when condensing in the heat exchanger, the cold water absorbs the sensible heat released by the refrigerant at the initial stage of heat exchange. The temperature is continuously increased until the cold water warms up and the refrigerant cools to the same temperature, and the refrigerant no longer releases heat.

For example, the cold water is about 25 ° C at the beginning of the heat exchange, and the refrigerant temperature is about 70 to 100 ° C. At this time, the cold water can absorb the heat of the refrigerant to rapidly heat up, and the high temperature and high pressure refrigerant cools due to the release of heat energy. When the temperature rises and the temperature drops and the temperature approaches, when the cold water rises to about 55 ° C, the refrigerant also cools to about 55 ° C. At this time, since the temperatures of the two are close to the same, the refrigerant can no longer release heat energy to the water flow. The water can no longer warm up.

In other words, when the conventional heat pump water heater exchanges heat between the refrigerant and the cold water, the water does not completely absorb the total heat stored in the refrigerant, especially in the latent heat, because the cold water heats up and the refrigerant cools to the same temperature to make the refrigerant When the heat energy is no longer released, the refrigerant still has not reached the temperature of releasing the latent heat (the heat energy released when the gas is converted into a liquid phase change), thus also causing a limitation on the heating temperature of the cold water; at present, the heating temperature of the heat pump water heater reaches approximately 55. °C can not break through, this is also a major problem that the industry has been unable to overcome.

In view of this, the creator has accumulated many years of practical experience and research experience in related fields, and created a "heat exchange device", which can not only effectively absorb the total heat of the heat source medium, but also break through the temperature limitations of the existing technology. To achieve the purpose of increasing water temperature and saving energy.

The purpose of this creation is to provide a "heat exchange device" that not only absorbs cold effectively The total thermal energy stored in the medium includes latent heat and sensible heat. It can also break through the limitations of existing technologies in terms of temperature, achieve the goal of increasing water temperature and saving energy, and has extremely high industrial value.

In order to achieve the above object, the heat exchange device of the present invention comprises a heating pipe through which a water supply flow flows, and a heat source conduit covering the heat supply medium outside the heating pipe, wherein:

The heating tube is wrapped in the heat source conduit, and comprises a water inlet, a preheating section connected to the water inlet to absorb the latent heat of the heat source medium in the heat source conduit, and a connection to the water flow direction from upstream to downstream. The preheating section is configured to absorb the sensible high temperature section of the heat source medium in the heat source conduit, and a water outlet connected to the high temperature section to discharge the high temperature hot water.

The heat source medium in the heat source conduit has a flow direction opposite to the water flow direction, and includes a heat source medium inlet corresponding to the heat pipe medium inlet and a heat source medium inlet, and a heat source medium according to the heat source medium flowing from the upstream to the downstream flow direction. The sensible heat release section of the inlet and relative to the high temperature section of the heating tube for releasing the sensible heat of the heat source medium, a latent heat connected to the sensible heat release section and used to release the latent heat of the heat source medium relative to the heating tube preheating section a release section and a heat source medium outlet connected to the latent heat release section relative to the water flow inlet.

In the above configuration, according to the flow direction of the heat source medium in the heat source conduit, the heat source medium first releases sensible heat upstream of the heat source conduit, and then releases latent heat downstream of the heat source conduit; in contrast, due to the direction of the water flow and the heat source in the heating tube The heat source medium of the conduit flows in the opposite direction, so that the water flow in the preheating section of the heating pipe can first absorb the latent heat of the heat source medium, and the downstream high temperature section can further absorb the sensible heat of the heat source medium when the water flow has warmed up.

In other words, in the process of heat exchange, for the heat source medium, the temperature gradually releases the heat from high to low, and the water temperature gradually absorbs the heat from low to high, so that the water can be almost exchanged after heat exchange. It completely absorbs the total heat of the heat source medium, and can break through the limitation of the temperature of the existing technology, and achieve the purpose of increasing the water temperature and saving energy.

It is worth mentioning that in the prior art, the total heat of the heat source medium is not considered. Sensible heat and latent heat, so when the water flow is exchanged with the heat source medium, the temperature is increasing and decreasing in the opposite direction, so that the increasing water temperature can only reach the same temperature as the decreasing heat source medium, and the heat source medium can no longer release heat energy. It is usually around 55 °C. In contrast, in this case, since the low-temperature water first absorbs the latent heat of the heat source medium in the preheating section at a lower temperature, and then further absorbs the sensible heat of the heat source medium at a higher temperature in the case where the water flow has warmed up, the temperature can break through the existing technology. Restricted, reaching the temperature at which the sensible heat is released at the beginning of the refrigerant; according to the actual experiment results of the creator of the case, the water flow can be heated to 70~100 °C, which can not only break the limit of the existing technical temperature of about 55 °C, but also effective Improve energy efficiency ratio COP.

According to the above structural features, in the implementation of the present invention, the heat source conduit and the heating pipe located in the heat source conduit through which the water supply flows, the tubular bodies of the two are linear or continuously curved, and the continuous curved shape can be at the same heat exchange distance. In the case of the situation, the configuration length is saved to facilitate the installation implementation.

According to the above structural features, when the present invention is implemented, the heat source conduit is covered with a heat insulating layer, and the heat source medium can release heat energy only to the water flow of the internal heating pipe.

According to the above structural feature, in the implementation of the present invention, the heat source medium outlet of the heat source conduit is sequentially connected with an expansion valve, an evaporator, a compressor, and then connected to the heat source medium inlet by the compressor to circulate the heat source medium.

According to the above structural feature, in the implementation of the present invention, the water outlet of the heating pipe is further connected to a water storage bucket for storing hot water for storing hot water.

Compared with the prior art, the water flow in the present heat exchange device can first absorb the latent heat of the heat source medium in the preheating section, and then further absorb the sensible heat of the heat source medium when the water flow has been heated, so that the temperature can break through the existing The technology is limited to about 55 ° C, heated to 70 ~ 100 ° C, not only can break through the limitations of the existing technology temperature, but also can effectively improve the heat exchange efficiency, improve the energy efficiency ratio, to achieve energy-saving purposes, is extremely high Industrial value.

Hereinafter, according to the technical means of the present creation, the implementation method suitable for the present creation is listed, and the following description is accompanied by the following description: As shown in the second figure, the heat exchange device of the present invention includes a heating pipe 10 through which the water supply flow flows, and a heat source conduit 20 covering the heat supply medium outside the heating pipe 10, wherein the heating pipe 10 is wrapped in the heat source conduit 20, and the water flow flows from upstream to downstream, as shown in the figure from left to right. And a water inlet port 11 , a preheating section 12 connected to the water inlet 11 to absorb the latent heat of the heat source medium in the heat source conduit 20 , and a preheating section 12 connected to the heat source medium in the heat source conduit 20 . The hot high temperature section 13 and a water outlet 14 connected to the high temperature section 13 to discharge high temperature hot water.

The heat source medium in the heat source conduit 20 has a flow direction opposite to the water flow direction, and the heat source medium flows from the upstream to the downstream, as shown in the figure from right to left, sequentially including a heat source medium inlet 21 and a sensible heat release portion. 22. A latent heat release section 23 and a heat source medium outlet 24.

The heat source medium inlet 21 corresponds to the water outlet 14 for the heat source medium to enter; the sensible heat release section 22 is opposite to the high temperature section 13 of the heating tube 10 to release the sensible heat of the heat source medium; the latent heat release section 23 and the heating tube The preheating section 12 of 10 is relatively applied to release the latent heat of the heat source medium; the heat source medium outlet 24 is corresponding to the water inlet 11 for the heat source medium to be discharged.

In the above configuration, the flow direction of the heat source medium in the heat source conduit 20 is to first release the sensible heat of the heat source medium in the sensible heat release section 22 upstream of the heat source conduit 20 (on the right side of the figure), and then downstream of the heat source conduit 20 (illustrated The latent heat release section 23 on the left side releases the latent heat of the heat source medium.

In contrast, since the direction of the water flow in the heating pipe 10 is opposite to the flow direction of the heat source medium of the heat source conduit 20, the low temperature water flow in the preheating section 12 upstream of the heating pipe 10 (left side of the drawing) can first absorb the heat source medium in the latent heat release section. 23 releases the lower temperature latent heat, and the high temperature section 13 downstream of the heating tube 10 (the right side of the figure) can further absorb the higher temperature sensible heat released by the heat source medium in the sensible heat release section 22 when the water flow has warmed up. . In this way, the water flow can almost completely absorb the total heat of the heat source medium after the heat exchange, and can break the limitation of the temperature of the existing technology, thereby achieving the purpose of increasing the water temperature and saving energy.

As shown in the third figure, in the implementation of the present invention, the heat source conduit 20 and the heating pipe 10 located in the heat source conduit 20 through which the water supply flows, the tubular bodies of the two may be straight or continuously curved; the continuous curved shape may be In the case of the same heat exchange distance, the arrangement length is saved to facilitate the installation, so that the water flow is closer to the position of the heat source medium inlet 21 upstream of the water outlet 14 and the heat source conduit 20 downstream of the heating pipe 10 (lower in the figure), and the temperature is The closer to the temperature at which the heat source medium releases sensible heat, the temperature is about 70~100 °C.

In addition, in the implementation of the present invention, a heat insulating layer 25 may be disposed on the outside of the heat source conduit 20, and the heat insulating layer 25 may isolate the heat source conduit 20 from the outside temperature, so that the heat source medium in the heat source conduit 20 only heats the interior thereof. The water flow of tube 10 releases thermal energy.

As shown in the fourth figure, in the implementation of the present invention, a schematic diagram of a general heat pump water heater system is shown. The heat source medium outlet 24 of the heat source conduit 20 is sequentially connected to an expansion valve 30, an evaporator 40, and a compressor. 50, the compressor 50 is connected to the heat source medium inlet 21 at the other end of the heat source conduit 20, so that the heat source medium can be circulated through the operation of the expansion valve 30, the evaporator 40, and the compressor 50, and is continuously in the heat source conduit 20. Perform heat exchange.

In addition, in the implementation of this creation, since the water flow temperature of the water outlet 14 of the heating pipe 10 can reach 70 to 100 ° C, in general household use, it can be directly mixed with appropriate cold water for immediate use, that is, a so-called instant water heater; if used in a restaurant, The use of hot water in the dormitory In a large location, the water outlet 14 can be further connected to a water storage tank 60 for storing hot water, which can be used in a heat storage water heater system.

In summary, the creation allows the water to first absorb the latent heat of the heat source medium in the preheating section, and then further absorb the sensible heat of the heat source medium when the water flow has warmed up, so that the temperature can effectively break through the existing technical temperature. The limitation of about 55 °C is achieved for the purpose of improving the water temperature and saving energy; however, the above description and drawings show only the preferred embodiments of the present invention, and are not intended to limit the creation; The approximation or similarity of the structure, installation, and features of the creation shall be within the creation purpose of the creation and the scope of the patent application. I hereby declare.

10‧‧‧heating tube

11‧‧‧Water inlet

12‧‧‧Preheating section

13‧‧‧High temperature section

14‧‧‧Water outlet

20‧‧‧heat source conduit

21‧‧‧Heat source media inlet

22‧‧‧ sensible heat release section

23‧‧‧ latent heat release section

24‧‧‧Hot source media outlet

25‧‧‧Insulation

30‧‧‧Expansion valve

40‧‧‧Evaporator

50‧‧‧Compressor

60‧‧ ‧ water bucket

The first picture is a schematic diagram of a conventional heat pump water heater system.

The second figure is a schematic structural view of a first embodiment of the creative heat exchange device.

The third figure is a schematic structural view of a second embodiment of the creative heat exchange device.

The fourth picture is a schematic diagram of the use of the general heat pump water heater system.

10‧‧‧heating tube

11‧‧‧Water inlet

12‧‧‧Preheating section

13‧‧‧High temperature section

14‧‧‧Water outlet

20‧‧‧heat source conduit

21‧‧‧Heat source media inlet

22‧‧‧ sensible heat release section

23‧‧‧ latent heat release section

24‧‧‧Hot source media outlet

25‧‧‧Insulation

Claims (5)

A heat exchange device comprising a heating pipe through which a water supply flow flows, and a heat source conduit covering the heat supply medium outside the heating pipe, wherein the heating pipe includes a water flow inlet and a water flow inlet in sequence according to the water flow direction. a preheating section for absorbing latent heat of the heat source medium in the heat source conduit, a high temperature section connected to the preheating section to absorb the sensible heat of the heat source medium in the heat source conduit, and a high temperature section connected to the high temperature section for discharging the high temperature hot water. The heat source conduit comprises a heat source medium inlet corresponding to the water outlet corresponding to the heat source medium, a heat source medium inlet connected to the heat source medium inlet and a high temperature section relative to the heat pipe for releasing the heat source medium according to the heat source medium circulation direction. a sensible heat sensible heat release section, a latent heat release section connected to the sensible heat release section and relative to the preheating section of the heating tube for releasing latent heat of the heat source medium, and a communication to the latent heat release section The heat source medium outlet at the water inlet. The heat exchange device according to claim 1, wherein the heat source conduit and the heating pipe through which the water supply flow flows in the heat source conduit are linear or continuously curved. The heat exchange device according to claim 1, wherein the heat source conduit is covered with a heat insulating layer. The heat exchange device of claim 1, wherein the heat source medium outlet of the heat source conduit is sequentially connected to an expansion valve, an evaporator, a compressor, and then connected to the heat source medium inlet by the compressor. The heat exchange device according to claim 1, wherein the water outlet of the heating pipe is further connected to a water storage tank storing hot water.