CN114993100A - Green building water heat collection balanced system - Google Patents

Abstract

The invention provides a water heat collecting and balancing system for a green building, relates to the technical field of waste water waste heat recovery, and provides the following solution for solving the problem that a plate heat exchanger in the existing waste water preheating and recovering system is easy to be attached with dirt: the waste water heat exchange device comprises a compressor, an evaporator, a condenser and a waste water heat exchange device, wherein the waste water heat exchange device comprises a waste water storage tank, a heat exchange mechanism is arranged in the waste water storage tank, a hollow heat exchange plate for circulating clean cold water is arranged in the heat exchange mechanism, a cleaning mechanism is further arranged in the waste water storage tank, a floater is arranged in the cleaning mechanism to enable the cleaning mechanism to move up and down along with the water level in the waste water storage tank, a brush is further arranged in the cleaning mechanism, and the brush hair of the brush is tightly attached to the surface of the hollow heat exchange plate and used for cleaning the surface of the hollow heat exchange plate when the cleaning mechanism moves up and down.

Description

A green building water and heat collection balance system

technical field

The invention relates to the technical field of waste water waste heat recovery, in particular to a green building water and heat collection balance system.

Background technique

The temperature of bath water (including but not limited to shower water and bath water) is generally between 40°C and 45°C, and the drainage temperature is between 30°C and 37°C, that is, only about 20% of the energy is usually used during use. , the remaining 80% of the heat is discharged into the sewage pipe network in the form of wastewater, resulting in a large waste of energy.

In order to recover the energy (waste heat) in the bathing wastewater, the prior art is to use a plate heat exchanger in series with a sewage source heat pump. After the bathing wastewater is filtered and purified, it is first passed into the plate heat exchanger to preheat the tap water, and the cooled bathing wastewater is then used as The low-temperature heat source uses the sewage source heat pump to continue to heat the preheated tap water, and the tap water is finally heated to above 40°C for bathing.

With the increase of use time, the dirt continues to adhere to the heat exchanger plates, resulting in the continuous reduction of the heat exchange area and the continuous decline of energy efficiency (every 1mm of dirt increases, the energy efficiency of the equipment decreases by 5%). The compressor load is increasing, it is easy to burn the compressor, and the dirt adheres to the plate to form spot corrosion.

The common cleaning method is to use the motor to drive the brush head to clean the surface of the heat exchanger plate. Since the outside of the heat exchanger plate is full of waste water, the motor must be a motor with good waterproof performance and extremely corrosion resistance, otherwise it cannot be used. , which greatly increases the cost of the device, and the post-maintenance cost after the motor fails is also high.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a green building water and heat collection balance system to solve the problems raised in the above background technology.

A green building water and heat collection balance system, comprising a compressor, an evaporator and a condenser, and a waste water heat exchange device, the waste water heat exchange device comprising a waste water storage tank, and a heat exchange mechanism is arranged in the waste water storage box, The heat exchange mechanism is provided with a hollow heat exchange plate for circulating clean cold water, the waste water storage tank is also provided with a cleaning mechanism, and a float is provided in the cleaning mechanism to make the cleaning mechanism follow the water level in the waste water storage tank up and down The cleaning mechanism is also provided with a brush, and the bristles of the brush are close to the surface of the hollow heat exchange plate for cleaning the surface of the hollow heat exchange plate when the cleaning mechanism moves up and down.

Preferably, the waste water storage tank includes a box body, the upper end of the box body is provided with a clean water inlet pipe, the lower end of the box body is provided with a clean water outlet pipe, and the two sides of the box body are symmetrically provided with waste water inlet pipes. A water pipe and a waste water outlet pipe are provided with a sewage outlet at the bottom of the box body, and an end cover is arranged at the sewage outlet.

Preferably, the part of the waste water inlet pipe and the waste water outlet pipe in the box body extends to the bottom surface of the box body.

Preferably, the heat exchange mechanism includes two water dividing plates arranged symmetrically up and down, the two water dividing plates are respectively connected with the water purification water inlet pipe and the water purification water outlet pipe, and several water dividing plates are evenly arranged between the water dividing plates. A hollow heat exchange plate is provided, and a plurality of through holes are evenly opened in the surface of the water dividing plate covered by the hollow heat exchange plate, and the through holes are communicated with the cold water channel in the hollow heat exchange plate.

Preferably, the hollow heat exchange plate has a corrugated outer surface.

Preferably, the cleaning mechanism includes four bases evenly arranged on the bottom surface of the box body, the bases are provided with guide posts, the base plates are slidably connected to the guide posts and placed on the bases, and the bases are arranged on the bases. A float is symmetrically arranged on the bottom surface.

Preferably, one side of the box body is further provided with a placement slot, one side of the base plate is provided with a bracket 1, and a coaxial gear and a bevel gear 1 are rotatably connected to the bracket 1, and the gear is connected to the first bracket. The racks in the placement slot are meshed with each other, and two brackets are symmetrically arranged on the side surface of the base plate. A transmission shaft is rotatably connected between the two brackets. The transmission shaft is provided with two bevel gears, and the first bevel gear is connected to The two bevel gears mesh with each other, the transmission shaft is also provided with a number of worms, the base plates at both ends of the hollow heat exchange plate are respectively rotatably connected with a driving wheel and a driven wheel, the driving wheel is coaxially connected with a worm wheel, and the The worm gear is engaged with the worm at the corresponding position, the driving wheel and the driven wheel are arranged in pairs and connected by a belt, the belt surrounds the hollow heat exchange plate, and the belt is provided with a brush that moves with the belt.

Preferably, the compressor, the secondary side of the evaporator, and the primary side of the condenser communicate with each other, and the low-temperature waste water discharged from the waste water outlet pipe and the low-temperature purified water discharged from the purified water outlet pipe are respectively passed to the evaporator. The primary side and the secondary side of the condenser, the low-temperature wastewater and the low-temperature purified water exchange heat again at the evaporator and the condenser to generate cooling wastewater and high-temperature purified water.

The advantages of the present invention are: a cleaning mechanism is provided, which can automatically clean the surface of the hollow heat exchange plate when water enters and exits the waste water storage tank, avoids the adhesion of dirt on the surface of the heat exchange plate, and greatly reduces the energy efficiency of the heat exchange plate. At the same time, it also slows down the growth rate of the compressor load, and avoids spot corrosion on the surface of the heat exchange plate due to dirt;

The cleaning mechanism in this device is driven by the buoyancy generated by the wastewater and the gravity of the device itself. It will be cleaned every time the wastewater enters and is discharged. The cleaning does not require manual operation, compared to the motor-driven cleaning method that requires manual control. , it is more worry-free to use, and the cost of this device is lower than that of the program-controlled motor drive method;

Since the hollow heat exchange plate in the device has the self-cleaning ability, the purification level of the waste water entering the waste water storage tank can be reduced, which not only reduces the cost, but also retains more waste heat from the waste water, and increases the energy efficiency of the waste heat recovery of the waste water.

Description of drawings

Fig. 1 is the structural representation of the present invention,

Fig. 2 is the sectional structure schematic diagram of the waste water storage tank in the present invention,

Fig. 3 is the internal structure schematic diagram of the present invention,

Fig. 4 is the cross-sectional structure schematic diagram of the present invention,

Fig. 5 is the structural representation of the cleaning mechanism in the present invention,

6 is a schematic diagram of the connection structure of the compressor, the evaporator and the condenser in the present invention,

In the figure: 1-wastewater heat exchange device, 11-wastewater storage tank, 1101-box body, 1102-purified water inlet pipe, 1103-purified water outlet pipe, 1104-wastewater inlet pipe, 1105-wastewater outlet pipe, 1106-sewage discharge mouth, 1107-end cover, 1108-placement slot, 12-heat exchange mechanism, 1201-hollow heat exchange plate, 1202-water separation plate, 1203-through hole, 13-cleaning mechanism, 1301-float, 1302-brush, 1303-base, 1304-guide column, 1305-base plate, 1306-support one, 1307-gear, 1308-bevel gear one, 1309-rack, 1310-support two, 1311-transmission shaft, 1312-bevel gear two, 1313-worm, 1314-drive wheel, 1315-driven wheel, 1316-worm wheel, 1317-belt, 2-compressor, 3-evaporator, 4-condenser.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1 to 6, a green building water and heat collection balance system includes a compressor 2, an evaporator 3 and a condenser 4, and also includes a waste water heat exchange device 1, and the waste water heat exchange device 1 includes a waste water storage device. The waste water storage tank 11 is provided with a heat exchange mechanism 12, the heat exchange mechanism 12 is provided with a hollow heat exchange plate 1201 for circulating clean cold water, and the waste water storage tank 11 is also provided with a cleaning mechanism 13 , the cleaning mechanism 13 is provided with a float 1301 to make the cleaning mechanism 13 follow the water level in the waste water storage tank 11 to move up and down, the cleaning mechanism 13 is also provided with a brush 1302, the bristles of the brush 1302 are close to the hollow The surface of the heat exchange plate 1201 is used to clean the surface of the hollow heat exchange plate 1201 when the cleaning mechanism 13 moves up and down.

In this embodiment, the waste water storage tank 11 includes a thermal insulation box body 1101 , the upper end of the box body 1101 is provided with a clean water inlet pipe 1102 , and the lower end of the box body 1101 is provided with a clean water outlet pipe 1103 , the two sides of the box body 1101 are symmetrically provided with a waste water inlet pipe 1104 and a waste water outlet pipe 1105. The waste water inlet pipe 1104 and the waste water outlet pipe 1105 are extended in the box body 1101 to be close to the bottom surface of the box body 1101. The waste water inlet pipe 1104 is extended to be close to the bottom surface of the box 1101 so that the water level can rise steadily when the waste water is put into the box 1101. The waste water outlet pipe 1105 is at a distance from the bottom surface of the box 1101 so that the bottom of the box 1101 is precipitated when the waste water is discharged. The materials will not be discharged together, the bottom of the box body 1101 is provided with a sewage outlet 1106 for discharging the sediment at the bottom of the box body 1101, and the sewage outlet 1106 is provided with an end cover 1107.

In this embodiment, the heat exchange mechanism 12 includes two water dividing plates 1202 arranged symmetrically up and down, and the two water dividing plates 1202 are respectively connected with the water purification water inlet pipe 1102 and the water purification water outlet pipe 1103. A number of hollow heat exchange plates 1201 are evenly arranged between the water plates 1202. A number of through holes 1203 are evenly opened on the surface of the water separation plate 1202 covered by the hollow heat exchange plates 1201. The through holes 1203 are connected to the hollow heat exchange plates 1201. The cold water channel in the heat exchange plate 1201 communicates with the hollow heat exchange plate 1201 and has a wave-shaped outer surface to increase the contact area with the waste water and speed up the heat exchange rate.

In this embodiment, the cleaning mechanism 13 includes four bases 1303 evenly arranged on the bottom surface of the box body 1101 , the bases 1303 are provided with guide posts 1304 , and the base plate 1305 is slidably connected to the guide posts 1304 and Placed on the base 1303, the bottom surface of the base plate 1305 is symmetrically provided with floats 1301, one side of the box 1101 is further provided with a placement slot 1108, one side of the base plate 1305 is provided with a bracket 1306, the The first bracket 1306 is rotatably connected with a coaxial gear 1307 and a bevel gear 1 1308, the gear 1307 meshes with the rack 1309 arranged in the placement slot 1108, and the side surface of the base plate 1305 is symmetrically provided with a second bracket 1310, A transmission shaft 1311 is rotatably connected between the two brackets 1310. The transmission shaft 1311 is provided with a second bevel gear 1312. The first bevel gear 1308 and the second bevel gear 1312 mesh with each other. The transmission shaft 1311 is also provided with a second bevel gear. A plurality of worms 1313, a driving wheel 1314 and a driven wheel 1315 are respectively rotatably connected to the base plates 1305 at both ends of the hollow heat exchange plate 1201, and a worm wheel 1316 is coaxially connected to the driving wheel 1314, and the worm wheel 1316 is connected to the worm at the corresponding position. 1313 meshes, the driving pulley 1314 and the driven pulley 1315 are arranged in pairs and connected by a belt 1317, the belt 1317 surrounds the hollow heat exchange plate 1201, and the belt 1317 is provided with a brush 1302 that moves with the belt 1317, the belt 1317 The brush 1302 can move up and down while traversing the surface of the hollow heat exchange plate 1201, which is more effective than simply moving up and down for cleaning.

In this embodiment, the compressor 2, the secondary side of the evaporator 3, and the primary side of the condenser 4 are connected to each other, and the low-temperature wastewater discharged from the wastewater outlet pipe 1105 and the low-temperature wastewater discharged from the purified water outlet pipe 1103 The purified water is respectively introduced into the primary side of the evaporator 3 and the secondary side of the condenser 4, and the low-temperature wastewater and the low-temperature purified water exchange heat again at the evaporator 3 and the condenser 4 to generate cooling wastewater and high-temperature purified water, The compressor 2, the evaporator 3 and the condenser 4 further recover the heat in the low-temperature waste water, which greatly increases the recovery effect of the waste heat of the waste water.

In this embodiment, the water outlet on the primary side of the evaporator 3 is connected to a sewage pipeline for discharging cooling waste water, and the water outlet on the secondary side of the condenser 4 is connected to a storage device such as a heat preservation water tank and is reserved for use .

Working principle and process: During use, the wastewater with high temperature is introduced into the tank 1101 from the wastewater inlet pipe 1104. When the water level in the tank 1101 gradually increases, the float 1301 receives the buoyancy and lifts the substrate 1305. , During this process, the gear 1307 rotates due to meshing with the rack 1309, and after several transmissions, the driving wheel 1314 is driven to rotate, and the driving wheel 1314 drives the belt 1317 and the brush 1302 on the belt 1317 to rotate, and the brush head of the brush 1302 rotates. The surface of the friction hollow heat exchange plate 1201 is cleaned;

Then, clean cold water is introduced into the hollow heat exchange plate 1201 through the clean water inlet pipe 1102, and the clean cold water and the high temperature wastewater exchange heat, complete the preheating, and generate low temperature wastewater and low temperature purified water, and then pass the low temperature wastewater and low temperature purified water respectively. into the primary side of the evaporator and the secondary side of the condenser;

When the refrigerant on the primary side of the condenser enters the secondary side of the evaporator, it exchanges heat with the low-temperature wastewater on the primary side of the evaporator. The temperature and pressure of the gaseous refrigerant is further increased after being compressed by the compressor. The compressed gaseous refrigerant enters the primary side of the condenser and exchanges heat with the low-temperature purified water on the secondary side of the condenser to make its temperature The rise becomes hot water for people to use.

It is known from the technical common sense that the present invention can be realized by other embodiments without departing from its spirit or essential characteristics. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims (8)

1. A water heat collecting balance system for green buildings comprises a compressor (2), an evaporator (3) and a condenser (4), it is characterized by also comprising a waste water heat exchange device (1), wherein the waste water heat exchange device (1) comprises a waste water storage tank (11), a heat exchange mechanism (12) is arranged in the wastewater storage tank (11), a hollow heat exchange plate (1201) for circulating clean cold water is arranged in the heat exchange mechanism (12), a cleaning mechanism (13) is also arranged in the waste water storage tank (11), a floater (1301) is arranged in the cleaning mechanism (13) to enable the cleaning mechanism (13) to move up and down along with the water level in the waste water storage tank (11), the cleaning mechanism (13) is also internally provided with a brush (1302), and bristles of the brush (1302) are tightly attached to the surface of the hollow heat exchange plate (1201) and used for cleaning the surface of the hollow heat exchange plate (1201) when the cleaning mechanism (13) moves up and down.

2. The green building water heat collection balance system according to claim 1, wherein the waste water storage tank (11) comprises a tank body (1101), a purified water inlet pipe (1102) is arranged at the upper end of the tank body (1101), a purified water outlet pipe (1103) is arranged at the lower end of the tank body (1101), a waste water inlet pipe (1104) and a waste water outlet pipe (1105) are symmetrically arranged at two sides of the tank body (1101), a sewage discharge port (1106) is arranged at the bottom of the tank body (1101), and an end cover (1107) is arranged at the sewage discharge port (1106).

3. The green building water heat collecting balance system according to claim 2, wherein the part of the waste water inlet pipe (1104) and the waste water outlet pipe (1105) in the tank (1101) extends to the bottom surface of the tank (1101).

4. The green building water heat collecting and balancing system according to claim 1, wherein the heat exchanging mechanism (12) comprises two water distribution plates (1202) which are arranged in an up-down symmetrical manner, the two water distribution plates (1202) are respectively communicated with a purified water inlet pipe (1102) and a purified water outlet pipe (1103), a plurality of hollow heat exchanging plates (1201) are uniformly arranged between the water distribution plates (1202), a plurality of through holes (1203) are uniformly formed in the surface of the water distribution plate (1202) covered by the hollow heat exchanging plates (1201), and the through holes (1203) are communicated with cold water channels in the hollow heat exchanging plates (1201).

5. The green building hydrothermal collection equilibrium system of claim 4, characterized in that the hollow heat exchange plate (1201) has a wavy outer surface.

6. The green building water heat collecting balance system according to claim 2, wherein the cleaning mechanism (13) comprises four bases (1303) uniformly arranged on the bottom surface of the box body (1101), guide posts (1304) are arranged on the bases (1303), the base plate (1305) is slidably connected to the guide posts (1304) and placed on the bases (1303), and floats (1301) are symmetrically arranged on the bottom surface of the base plate (1305).

7. The green building water heat collecting and balancing system according to claim 6, wherein a placing groove (1108) is further provided at one side of the box body (1101), a first bracket (1306) is provided at one side of the base plate (1305), a coaxial gear (1307) and a first bevel gear (1308) are rotatably connected to the first bracket (1306), the gear (1307) is engaged with a rack (1309) provided in the placing groove (1108), a second bracket (1310) is symmetrically provided at a side surface of the base plate (1305), a transmission shaft (1311) is rotatably connected between the second brackets (1310), a second bevel gear (1312) is provided on the transmission shaft (1311), the first bevel gear (1308) is engaged with the second bevel gear (1312), a plurality of worms (1313) are further provided on the transmission shaft (1311), a driving wheel (1314) and a driven wheel (1315) are rotatably connected to the base plates (1305) at two ends of the hollow heat exchange plate (1201) respectively, the heat exchange plate is characterized in that a worm wheel (1316) is coaxially connected to the driving wheel (1314), the worm wheel (1316) is meshed with a worm (1313) at a corresponding position, the driving wheel (1314) and the driven wheel (1315) are arranged in pairs and connected through a belt (1317), the belt (1317) surrounds the hollow heat exchange plate (1201), and a brush (1302) moving along with the belt (1317) is arranged on the belt (1317).

8. The green building water heat collecting and balancing system according to claim 2, wherein the compressor (2), the secondary side of the evaporator (3) and the primary side of the condenser (4) are communicated with each other, low-temperature wastewater discharged from the wastewater outlet pipe (1105) and low-temperature purified water discharged from the purified water outlet pipe (1103) are respectively introduced into the primary side of the evaporator (3) and the secondary side of the condenser (4), and the low-temperature wastewater and the low-temperature purified water exchange heat again at the evaporator (3) and the condenser (4) to generate cooling wastewater and high-temperature purified water.

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