CN203824007U - Thermosiphonhot-water system for domestic air conditionerexhaust energyrecovery - Google Patents

Abstract

The utility model relates to a thermosiphonhot-water system for domestic air conditionerexhaust energyrecovery and belongs to the technical field of refrigerating systemwaste heat recovery. According to the thermosiphonhot-water system, on the basis of a heat pipe principle, a large amount of vaporizationlatent heat released during phase change of a low-boiling-point working medium is used for realizing the high heat exchange efficiency, and thewaste heat recoveryeffect is significant; by the aid of the thermosiphonhot-water system, the compressor exhaust pipe temperature and the condenser load can be reduced, and performance coefficients of an original refrigerating system can be increased; hot water is stored in a water tank in a heat storage manner, so that differentliving needs are met, and the problem that ordinary families use air conditioners and hot water at different time is solved; the thermosiphonhot-water system is simple in structure and convenient to mount and dismount, when a domestic air conditioner is refitted, the structure of the original refrigerating system cannot be changed, and no effect is caused to the safety and the stability of the system; no engineering change is required to be performed on the original refrigerating system, so that the thermosiphonhot-water system is low in mounting cost, short in payback period and convenient to popularize and apply.

Description

A thermosiphon hot water system for recovery of exhaust energy from household air conditioners

technical field

The utility model relates to a thermosiphon hot water system used for recovering exhaust energy of a household air conditioner, which belongs to the technical field of waste heat recovery of refrigeration systems.

Background technique

With my country's increasing emphasis on energy conservation and emission reduction and the continuous increase in energy costs, the full use of refrigeration system energy has received more and more attention. The exhaust temperature of the compressor of the household air conditioner is relatively high, generally in the range of 90-120°C. If this part of energy is discharged to the cooling medium, that is, the natural environment through the condenser of the air conditioner, it is undoubtedly a waste of energy.

In order to recover the exhaust energy of the air conditioner compressor, it is more common practice to install a special waste heat recovery heat exchanger on the connecting pipe between the compressor and the condenser of the refrigeration system, so as to recover the energy. Refrigeration system waste heat recovery device (200810188212.1), a simple refrigeration system heat recovery device (200920265752.5), a new type of refrigeration system waste heat recovery heat exchanger (200920278916.8) The three patents are all focused on the exhaust energy of refrigeration compressors recycling. The scheme of the above-mentioned patent is to install a once-through casing heat exchanger on the exhaust pipeline of the compressor, use water as the medium to flow in one direction in the casing, and recover the exhaust energy to heat up the water. However, the biggest disadvantage of these solutions is that the water flows in one direction in the once-through casing heat exchanger, the temperature rise of the water is small, the heat transfer effect is poor, and the waste heat recovery effect is not significant; The time of the water is not synchronized, and it is not ideal to adopt the direct-flow waste heat recovery scheme.

In order to more efficiently recover the exhaust energy of the compressor of the air conditioner and solve the problem of the above-mentioned heat recovery device when recovering the exhaust heat of the compressor of the household air conditioner, the technical solution of the utility model is designed.

Contents of the invention

The purpose of this utility model is to provide a thermosiphon hot water system for recovering exhaust energy of household air conditioners, based on the principle of heat pipes, using low boiling point working medium, adopting a heat storage structure, and recycling the exhaust pipe of the compressor of household air conditioners The heat from the road is used to make domestic hot water to realize the full utilization of energy.

In order to achieve the above purpose, the technical solution adopted by the utility model is a thermosiphon hot water system for recovering exhaust energy of household air conditioners. , a throttling device, an evaporator, and a thermosiphon hot water system connected on the pipeline between the compressor outlet and the condenser inlet. The compressor continuously sucks the low-pressure and low-temperature refrigerant vapor generated in the evaporator, compresses it into high-temperature and high-pressure refrigerant vapor, and transports it to the condenser through the compressor exhaust pipe. After cooling and condensation in the condenser, the refrigerant becomes normal temperature High-pressure liquid state, through the throttling device, the refrigerant liquid at room temperature and low pressure flows into the evaporator, the refrigerant liquid evaporates in the evaporator, and absorbs heat from the object to be cooled, and the cycle reciprocates to produce refrigeration. The thermosiphon hot water system is installed on the exhaust pipe of the compressor to recover the waste heat of the exhaust pipe of the compressor and supply domestic hot water to achieve the purpose of energy saving.

The thermosiphon hot water system includes a heat-absorbing module, a thermosiphon, an insulated water tank, a thermostat, and a temperature control valve; One end is inserted into the heat preservation water tank, and the temperature control valve is installed on the water inlet and outlet pipes of the heat preservation water tank; the temperature controller controls the water temperature of the heat preservation water tank within the range of 40-80°C, and when the water temperature reaches the set value, the temperature controller acts and turns on the temperature control valve. Control the valve to supply hot water to the outside, otherwise the temperature control valve is closed and continue to heat the water until the water temperature reaches the set value.

The heat-absorbing module is a two-half shell structure, and each half shell includes the inner side of the thermosiphon heat exchanger, the outer side of the thermosiphon heat exchanger, the lower end cover of the thermosiphon heat exchanger, the upper end cover of the thermosiphon heat exchanger, and the boss , bolt holes, bolts; each of the half-shells has mutually symmetrical counterbores for connecting with the thermosiphon; the connection method is threaded connection or welding; cavity, and the counterbore is located between the lower end cover of the thermosiphon heat exchanger and the upper end cover of the thermosiphon heat exchanger; the connecting section between the thermosiphon tube and the heat preservation water tank is provided with a working fluid filling port, which is used to add a thermosiphon tube into the airtight cavity Working medium; two groups of bosses are arranged on the outside of each half-shell, and the bosses are provided with bolt holes, and the two half-shells are connected together by bolts.

Compared with the prior art, the utility model has the following beneficial effects.

1. Based on the heat pipe principle, a large amount of latent heat of vaporization released during the phase transition of the low-boiling point working fluid is used to obtain high heat exchange efficiency and remarkable waste heat recovery effect.

2. The utility model can reduce the temperature of the exhaust pipeline of the compressor and the load of the condenser, and improve the coefficient of performance of the original refrigeration system.

3. Store hot water in the water tank in the form of heat storage to meet different living needs and solve the problem of out-of-sync time between the use of air conditioners and hot water in ordinary families.

4. The utility model has a simple structure and is easy to install and disassemble. When refitting a household air conditioner, it will not make any changes to the structure of the original refrigeration system, and will not have any impact on the safety and stability of the system.

5. Because there is no need to make any engineering changes to the original refrigeration system, the installation cost is low and the investment recovery period is short, which is convenient for popularization and application.

Description of drawings

Fig. 1 is a schematic diagram of a thermosiphon hot water system used for recovery of exhaust energy from household air conditioners;

Fig. 2 is the schematic diagram of embodiment one thermosiphon hot water system;

Fig. 3 is a schematic diagram of an exploded structure of the thermosiphon heat exchanger in Fig. 2;

Fig. 4 is a top view of the thermosiphon heat exchanger in Fig. 2;

Fig. 5 is a left view of the thermosiphon heat exchanger in Fig. 2;

Fig. 6 is a schematic diagram of a thermosiphon hot water system in Embodiment 2.

In the figure: 1-heat-absorbing module, 2-thermosiphon, 2.1-thermosiphon a, 2.2-thermosiphon b, 2.3-thermosiphon c, 3-insulating water tank, 4-thermostat, 5-temperature control valve, 6 - Thermosiphon working medium, 7- Closed cavity, 8 - Vertical tube heat exchanger, 11 - Inside of thermosiphon heat exchanger, 12 - Outside of thermosiphon heat exchanger, 13 - Lower end cover of thermosiphon heat exchanger, 14 -The upper end cover of the thermosiphon heat exchanger, 15-working fluid filling port, 16-boss, 17-bolt hole, 18-bolt, 21-compressor, 22-condenser, 23-throttling device, 24-evaporation Device, 25-compressor exhaust pipe, 26-thermosiphon hot water system.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Embodiment one

As shown in Figures 1 to 5, a thermosiphon hot water system for recovering exhaust energy from a household air conditioner, the system includes a household air conditioner compressor 21, a compressor high-temperature exhaust pipeline 25, a condenser 22, The throttling device 23 and the evaporator 24 also include a thermosiphon hot water system 26 connected to the pipeline between the compressor outlet and the condenser inlet. The compressor 21 continuously sucks the low-pressure and low-temperature refrigerant vapor generated in the evaporator 24, compresses it into high-temperature and high-pressure refrigerant vapor, and transports it to the condenser 22 through the compressor exhaust pipe 25, and undergoes cooling and condensation in the condenser 25. The refrigerant turns into a normal temperature and high pressure liquid, passes through the throttling device 23 into a normal temperature and low pressure refrigerant liquid, and flows into the evaporator 24. The refrigerant liquid evaporates in the evaporator 24 and absorbs heat from the object to be cooled, and the cycle reciprocates to produce refrigeration. The thermosiphon hot water system 26 is installed on the compressor discharge pipe 25 to recover waste heat from the compressor discharge pipe 25 and supply domestic hot water to achieve the purpose of energy saving.

The thermosiphon hot water system 26 includes a heat-absorbing module 1, a thermosiphon 2, an insulated water tank 3, a thermostat 4, and a temperature control valve 5; One end is connected to the heat-absorbing module 1, and the other end is inserted into the heat-retaining water tank 3, and the temperature control valve 5 is installed on the water inlet and outlet pipes of the heat-retaining water tank 3; the temperature controller 4 controls the water temperature of the heat-retaining water tank 3 within the range of 40-80°C , when the water temperature reaches the set value, the thermostat 4 acts to open the temperature control valve 5 to supply hot water to the outside, otherwise the temperature control valve 5 is closed and continues to heat the water until the water temperature reaches the set value.

The heat-absorbing module 1 is a two-half shell structure, and each half shell includes the inner side 11 of the thermosiphon heat exchanger, the outer side 12 of the thermosiphon heat exchanger, the lower end cover 13 of the thermosiphon heat exchanger, and the upper end of the thermosiphon heat exchanger Cover 14, boss 16, bolt holes 17, and bolts 18; each half-shell has mutually symmetrical counterbores for connecting with the thermosiphon 2; the connection method is threaded connection or welding; the counterbores Form airtight cavity 7 after being connected with thermosiphon tube 2, counterbore is positioned between thermosiphon tube heat exchanger lower end cover 13 and thermosiphon tube heat exchanger upper end cover 14; Described thermosiphon tube 2 and insulating water tank 3 connection section are provided with tool The substance filling port 15 is used to add the thermosiphon working medium 6 into the airtight cavity 7; two groups of bosses 16 are arranged on the outside of each half shell, and the bosses 16 have bolt holes 17, and the two half shells pass through Bolts 18 are connected together;

The thermosiphon 2 is n (1-10) single pipes, or it can be m (2-10) connected pipes at the tail section, which can be placed parallel to the exhaust pipe 25 of the compressor, or can be placed as it is far away from the compressor. The discharge pipe 25 is gradually placed at 0-90° with the compressor discharge pipe 25.

The part where the thermosiphon 2 is immersed in the heat preservation water tank 3 is a coiled pipe or a vertical tube heat exchanger.

The thermosiphon working fluid 6 is one of R22, R32, R134a, R152a, R245fa, R290 or a mixture of several of them.

Figure 2 is a schematic diagram of a thermosiphon hot water system in Embodiment 1. The housing is made of a metal material with good thermal conductivity (such as copper or aluminum), and the size of each part can be determined according to the outer diameter of the compressor discharge pipe 25 and the internal space of the outdoor unit of the household air conditioner.

The thermosiphon 2 is a folded U-shaped tube, the lower part is placed parallel to the compressor exhaust pipe 25, and the upper part is placed at an angle of 45° to the compressor exhaust pipe 25. The heat exchange area is increased by folding the U-shaped tube.

When the utility model is installed, first apply heat-conducting silica gel on the installation part on the air conditioner compressor exhaust pipe 25, so that the surface of the inner side 11 of the thermosiphon heat exchanger is closely in contact with the outer surface of the high-temperature compressor exhaust pipe 25, In order to improve the heat conduction performance, then the two halves of the heat absorption module 1 are fixed on the exhaust pipe 25 of the compressor in a bolted manner.

All the heat exchangers and hot water pipelines of the utility model use heat-insulating materials to insulate the system, so as to improve the efficiency of energy use.

The process of air conditioner exhaust energy recovery is as follows: the thermosiphon working medium 6 is injected into the closed cavity 7 from the working medium filling port 15, the household air conditioner is turned on, the refrigeration system starts to operate, and the heat of the high-temperature refrigerant vapor in the refrigeration system is transferred to the compressor. The pipe wall of the machine exhaust pipe 25 is then transmitted to the inner side of the thermosiphon heat exchanger 11 through heat-conducting silica gel, and then transmitted to the closed cavity 7 through a metal material with good thermal conductivity (such as copper or aluminum), so that the closed cavity 7 The thermosiphon working medium 6 inside absorbs heat and evaporates, changing from a liquid phase to a gas phase, and the gaseous thermosiphon working medium 6 goes up along the thermosiphon 2 to the heat preservation water tank 3 and condenses when encountering cold water, changing from a gas phase to a liquid phase, and due to gravity The function goes down along the inner wall of the thermosiphon tube 2 and returns to the bottom of the airtight cavity 7. In this way, the waste heat of the exhaust pipe 25 of the compressor is continuously transported to the thermal insulation water tank 3 for the production of domestic hot water. Store hot water to realize the recovery, transfer and reuse of exhaust energy from household air conditioners.

Embodiment two

Figure 6 is a schematic diagram of the thermosiphon hot water system in Embodiment 2. In this embodiment, the exhaust pipe 25 of the compressor of the air conditioner is located at a horizontal position.

The heat absorbing module 1 is a sleeve structure outside the exhaust pipe 25 of the compressor, and the sleeve is made of a metal material (such as copper or aluminum) with good thermal conductivity.

The lower end cover 13 of the thermosiphon heat exchanger and the upper end cover 14 of the thermosiphon heat exchanger are brazed with the bushing and the exhaust pipe 25 of the compressor. The tube heat exchanger 8 is connected; the thermosiphon 2 includes thermosiphon a2.1, thermosiphon b2.2, thermosiphon c2.3; the gaseous thermosiphon working fluid 6 goes up along the thermosiphon a2.1 and thermosiphon b2.2 To the vertical tube heat exchanger 8, after condensation, it flows back into the casing along the thermosiphon c2.3.

The process of air conditioner exhaust energy recovery is as follows: the heat of the high-temperature refrigerant vapor in the refrigeration system is transferred to the pipe wall of the compressor discharge pipe 25, and then transferred to the sleeve pipe wall through the heat-conducting silica gel, and then passed through the metal material with good thermal conductivity. (such as copper or aluminum) and then transferred to the thermosiphon working medium 6, so that the thermosiphon working medium 6 absorbs heat and evaporates, changing from liquid phase to gas phase, and the gaseous thermosiphon working medium 6 moves along the thermosiphon a2.1 and thermosiphon b2.2 Go up to the vertical pipe heat exchanger 8, change from the gas phase to the liquid phase after condensation, and flow back into the casing along the thermosiphon c2.3.

All the other parts are the same as the first embodiment, and the working method is also the same.

The above is only a preferred and feasible embodiment of the utility model, and cannot therefore limit the scope of rights of the utility model. All other corresponding changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (9)

1. the thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy, it is characterized in that: this system comprises domestic air conditioner compressor (21), compressor high-temperature exhaust pipe (25), condenser (22), throttling arrangement (23), evaporimeter (24), also comprise and be connected to the thermal siphon hot-water heating system (26) on pipeline between described compressor outlet and condenser inlet; Described compressor (21) constantly aspirates the low-pressure low-temperature refrigerant vapour producing in evaporimeter (24), boil down to high-temperature high-pressure refrigerant steam, be transported to condenser (22) through compressor blast pipe (25), in condenser (25) through cooling and condensation process, cold-producing medium becomes normal temperature high voltage liquid condition, become normal temperature low pressure refrigerant liquid through throttling arrangement (23) and flow into evaporimeter (24), refrigerant liquid evaporates in evaporimeter (24), and from the object heat absorption that is cooled, generation refrigeration moves in circles; It is upper that thermal siphon hot-water heating system (26) is arranged on compressor exhaust pipe (25), in order to reclaim compressor exhaust pipe (25) waste heat, supplies with domestic hot-water, reaches energy-conservation object;

Described thermal siphon hot-water heating system (26) comprises heat-absorbing model (1), thermal siphon (2), attemperater (3), temperature controller (4), temperature-sensing valve (5); Heat-absorbing model (1) is close to compressor exhaust pipe (25), and one end of thermal siphon (2) is connected with heat-absorbing model (1), and its other end inserts in attemperater (3), and temperature-sensing valve (5) is contained on the water inlet pipe and water outlet pipe of attemperater (3); Described temperature controller (4) is controlled the water temperature of attemperater (3) within the scope of 40～80 DEG C, when water temperature reaches setting value, and temperature controller (4) action, open temperature-sensing valve (5), outward supplying heat water, otherwise temperature-sensing valve (5) cuts out, and continues heating water until water temperature reaches setting value;

Described heat-absorbing model (1) is two halves shell structure, and every half housing comprises thermal siphon heat exchanger inner side (11), thermal siphon heat exchanger outside (12), thermal siphon heat exchanger bottom end cover (13), thermal siphon heat exchanger upper end cover (14), boss (16), bolt hole (17), bolt (18); Described every half housing has symmetrical counterbore, in order to be connected with thermal siphon (2); Described connected mode is for being threaded or welding; Described counterbore is by forming closed cavity (7) after being connected with thermal siphon (2), counterbore is positioned between thermal siphon heat exchanger bottom end cover (13) and thermal siphon heat exchanger upper end cover (14); Described thermal siphon (2) is provided with working medium with attemperater (3) linkage section and fills mouthful (15), in order to add thermal siphon working medium (6) in closed cavity (7); Described every half hull outside is provided with two groups of boss (16), and boss (16) has bolt hole (17), and two halves housing links together by bolt (18).

2. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, it is characterized in that: the process that air-conditioner exhaust energy reclaims is as follows, thermal siphon working medium (6) fills mouthful (15) by working medium and injects closed cavity (7), open domestic air conditioner, refrigeration system brings into operation, in refrigeration system, the heat of high temperature refrigerant steam is passed to the tube wall of compressor exhaust pipe (25), then by heat conductive silica gel, be passed to thermal siphon heat exchanger inner side (11); Be passed to again closed cavity (7) by the good metal material of heat conductivility, make thermal siphon working medium (6) the heat absorption evaporation in closed cavity (7), become gas phase from liquid phase, gaseous state thermal siphon working medium (6) goes upward to chance cold water heat release in attemperater (3) along thermal siphon (2) and condenses, become liquid phase from gas phase, and because Action of Gravity Field is along descending closed cavity (7) bottom that is back to of thermal siphon (2) inwall; So move in circles, the waste heat used heat of compressor exhaust pipe (25) is constantly transported to attemperater (3), for producing domestic hot-water, and in the mode of accumulation of heat, hot water is stored, realize recovery, transmission and the recycling of domestic air conditioner exhaust energy.

3. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, is characterized in that: described thermal siphon (2) is n root single tube, described 1≤n≤10; Also can be the comb that m root rear is communicated with, described 2≤m≤10; Thermal siphon (2) can be parallel to compressor exhaust pipe (25) to be laid, and also can lay along with being 0～90 ° with compressor exhaust pipe (25) gradually away from compressor exhaust pipe (25).

4. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, is characterized in that: it is a coil pipe or upright calandria heat exchanger that described thermal siphon (2) is immersed in attemperater (3) part.

5. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, is characterized in that: described thermal siphon working medium (6) is a kind of in R22, R32, R134a, R152a, R245fa, R290 or several mixture wherein.

6. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, it is characterized in that: thermal siphon (2) is a folding U-shaped pipe, lower parallel is laid in compressor exhaust pipe (25), top and compressor exhaust pipe (25) are the angle of 45 ° to be laid, by by folding U-shaped pipe to increase heat exchange area.

7. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, it is characterized in that: the utility model when mounted, first heat conductive silica gel is smeared in the installation position on cooler compressor blast pipe (25), the surface of thermal siphon heat exchanger inner side (11) is closely contacted with the outer surface of high temperature compressed machine blast pipe (25), to improve heat conductivility, then the two halves housing of heat-absorbing model (1) is fixed on compressor exhaust pipe (25) by bolted mode; Meanwhile, all heat exchangers of the utility model and hot water line adopt insulation material to be incubated system, to improve the service efficiency of the energy.

8. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1, is characterized in that: heat-absorbing model (1) can also be the outer sleeve structure of compressor exhaust pipe (25);

Thermal siphon heat exchanger bottom end cover (13) and thermal siphon heat exchanger upper end cover (14) get up with sleeve pipe and compressor exhaust pipe (25) soldering, thermal siphon (2) one end is connected with sleeve pipe, and the other end is connected with a upright calandria heat exchanger (8) in attemperater (3); Described thermal siphon (2) comprises thermal siphon a(2.1), thermal siphon b(2.2), thermal siphon c(2.3); Gaseous state thermal siphon working medium (6) is along thermal siphon a(2.1), thermal siphon b(2.2) go upward to upright calandria heat exchanger (8), after condensing along thermal siphon c(2.3) be back in sleeve pipe.

9. a kind of thermal siphon hot-water heating system reclaiming for domestic air conditioner exhaust energy according to claim 1 and 2, is characterized in that: the two halves housing of described heat-absorbing model (1) can be manufactured for copper or aluminium by the good metal material of heat conductivility.