CN216744923U - Waste heat cascade utilization water source heat pump water heater with air supply device - Google Patents

Abstract

The utility model discloses a waste heat cascade utilization water source heat pump water heater with an air supplement device, which comprises a water-water heat exchanger, two evaporators, two condensers, two compressors, two liquid storage tanks and other parts, the utility model discloses a pipeline between an evaporator group and a waste water discharge port is provided with the air supplement device, when bathing waste water enters the water heater to prepare hot water and flows through the air supplement device, the bathing waste water jacks up plastic balls in the air supplement device to block the upper port of the air supplement device, so that the equipment is in a sealing state; when the water heater stops heating water, the bathing wastewater does not enter the equipment, the plastic pellets fall onto the pellet guide seat, and air enters the equipment from the upper port of the air supplementing device, so that the negative pressure environment of the equipment is destroyed, and the bathing wastewater can better flow out of the equipment.

Description

Waste heat cascade utilization water source heat pump water heater with air supply device

Technical Field

The utility model belongs to the technical field of the building energy conservation, concretely relates to used heat cascade utilization water source heat pump water heater who is equipped with air supplement unit.

Background

8.3 hundred million urban population in China in 2018, and is calculated according to 39.6 liters of actual bath water per person per day of GB/T50331-2002The total amount of domestic bath wastewater is 120 hundred million m³. The recycled clean energy is 1.28 multiplied by 10 according to the discharge of 3 ℃ after the waste water is utilized at the temperature of 31 DEG C⁷ The heat energy value is 3 times of that of 1118 hundred million kilowatt hour of the electricity generated by the three gorge power station in 2020.

Therefore, researchers in the field use heat pump technology to recover waste hot water, for example, secondary waste heat recovery heat pumps of Shandong Runno general equipment company can heat clear water at 15-16 ℃ to 40-43 ℃. Waste heat secondary recovery devices are developed by Fuji general company and Mitsubishi motor European research and development center and the like abroad. The equipment realizes the recovery of the waste bath heat to prepare hot water, and is also applied to centralized bathing places in small scale, but the waste heat is not completely recovered, the discharge temperature of the waste water is usually over 10 ℃, the waste water cannot be used for preparing the same amount of bathing hot water by the same amount of waste bath water and waste heat, and 30-50% of auxiliary heat sources are still needed.

Patent CN214581409U discloses a water source heat pump water heater for three-layer cascade utilization of waste water and waste heat, which creatively realizes three-level cascade recycling of low-grade waste heat in one device. The equipment mainly comprises a water-water heat exchanger, two groups of evaporators, two groups of condensers, two throttle valves and two compressors, wherein the evaporators, the throttle valves, the condensers and the compressors form a compressed steam refrigeration cycle in sequence. The water-water heat exchanger is arranged at the lowest part, the two groups of evaporators and the two groups of condensers are arranged above the water-water heat exchanger in a parallel position, and the evaporators 1, the evaporators 2, the condensers 1 and the condensers 2 are arranged in a crossed manner (as shown in figure 1). The technical scheme enables waste heat to be recovered to the maximum extent, the discharge temperature of the waste water is as low as 3 ℃, and the aim of preparing equivalent bath hot water from equivalent bath waste water and waste heat is achieved. However, after the operation of the device is stopped, the bathing wastewater in the evaporator group cannot be discharged completely, and is retained in the evaporator group, so that dirt is easily formed, and the working efficiency of the evaporator group is affected.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a waste heat cascade utilization water source heat pump water heater with an air supplement device, wherein the air supplement device is arranged on a pipeline between an evaporator group and a waste water discharge port, when bathing waste water enters the water heater to prepare hot water and flows through the air supplement device, the bathing waste water jacks plastic pellets in the air supplement device to block an upper port of the air supplement device, so that the equipment is in a sealed state; when the water heater stops heating water, the bathing wastewater does not enter the equipment, the plastic pellets fall onto the pellet guide seat, and air enters the equipment from the upper port of the air supplementing device, so that the negative pressure environment of the equipment is destroyed, and the bathing wastewater can better flow out of the equipment.

The utility model provides a technical scheme as follows:

a waste heat cascade utilization water source heat pump water heater with an air supply device is sequentially provided with a water-water heat exchanger, an evaporator I, a condenser I, an evaporator II and a condenser II from bottom to top, wherein the evaporator I is connected with the evaporator II in series, the condenser I is connected with the condenser II in series, the water-water heat exchanger is provided with a waste hot water inlet and a waste hot water outlet, the waste hot water outlet is connected with the evaporator II, and the evaporator I is provided with a waste water discharge port; the refrigeration system is characterized by further comprising a compressor I, a compressor II, a gas-liquid separator I, a gas-liquid separator II, a throttle valve I, a throttle valve II, a liquid storage tank I and a liquid storage tank II, wherein the compressor I, the condenser I, the liquid storage tank I, the throttle valve I, the evaporator I and the gas-liquid separator I form a refrigeration loop system in sequence; the compressor II, the condenser II, the liquid storage tank II, the throttle valve II, the evaporator II and the gas-liquid separator II form a refrigeration loop system in sequence; the pipeline between the waste hot water outlet and the evaporator II is provided with an air supplementing device, the air supplementing device is communicated with the pipeline, the air supplementing device is of a hollow cylindrical structure, a plastic small ball and a hollow small ball guide seat are arranged in the air supplementing device, the diameter of the small ball is larger than that of the upper port of the cylindrical structure, and the small ball moves up and down in the space between the small ball guide seat and the upper port of the cylindrical structure.

Preferably, a connecting end is arranged on a pipeline between the waste hot water outlet and the evaporator II, inner spiral threads are arranged at the bottom of the air supply device, and the air supply device is detachably connected to the pipeline.

Compared with the prior art, the utility model discloses a technical advantage as follows:

the bathing wastewater inlet of the existing waste heat cascade utilization water source heat pump water heater is positioned at the lower position of the whole equipment, and when the equipment stops water production, the bathing wastewater remained in the equipment naturally flows downwards in the equipment under the influence of gravity and finally flows out from the bathing wastewater inlet. However, because the whole equipment is in a sealed environment when in operation, negative pressure is easily formed in the equipment when the equipment stops operation, and the bath wastewater cannot be completely discharged from the equipment.

The utility model provides an air supplement unit is an improvement to current vertical check valve, removes the spring in original check valve (as shown in figure 3), because of the spring can obstruct the plastic pellet downstream to can not destroy the negative pressure environment in the equipment. The utility model provides a plastics bobble does not have the restraint of spring, when bathing waste water flows through, because of its weight is lighter, the last port of air supplement unit is plugged up by bathing waste water jack-up, make whole equipment be in sealed environment, when there is not bathing waste water when air supplement unit, plastics bobble whereabouts to the bobble guide holder on, the air gets into equipment from air supplement unit's last port, the negative pressure environment in the equipment is destroyed, bathing waste water flows well from equipment, the production of dirt on the inner wall of reduction evaporimeter and heat exchanger, guaranteed that whole equipment can continuously move high-efficiently. The utility model is simple in operation, the cost is extremely low, and air supplement unit can dismantle the connection, changes easily, need not the training of specialty, and ordinary staff can accomplish, can realize the scale and use.

Drawings

FIG. 1 is a schematic structural diagram of a water source heat pump water heater disclosed in the background of the art

FIG. 2 is a schematic structural diagram of a water source heat pump water heater disclosed in the background of the art

FIG. 3 is a partial sectional structural view of a conventional standing check valve

FIG. 4 is a schematic structural view of the water source heat pump water heater of the present invention

FIG. 5 is a schematic view of a partial sectional structure of the air supply device of the present invention

Wherein: 1. the system comprises a water-water heat exchanger 2, an evaporator I3, a condenser I4, an evaporator II 5, a condenser II 6, a compressor I7, a compressor II 8, a gas-liquid separator I9, a gas-liquid separator II 10, a throttle valve I11, a throttle valve II 12, a liquid storage tank I13, a liquid storage tank II 14, an air supply device 15, a small ball 16, a small ball guide seat 17, a waste hot water inlet 18, a pipeline 19 and a spring.

Detailed Description

The invention will now be further described with reference to specific embodiments and drawings. It should be noted that, the present invention is based on the water source heat pump water heater disclosed in the background art, and the change is made on the pipeline between the evaporator set and the waste water and waste heat water outlet, so that in fig. 4, the drawing of the condenser set, the compressor, the throttle valve, the liquid storage tank and other parts is omitted.

The utility model discloses a waste heat cascade utilization water source heat pump water heater with air supplement unit, it is shown in figure 1 by lower supreme water-water heat exchanger 1 that has set gradually, evaporimeter I2 and condenser I3, evaporimeter II 4 and condenser II 5, evaporimeter I2 establishes ties with evaporimeter II 4 and forms the evaporimeter group, is located one side of hot water system, and condenser I3 establishes ties with condenser II 5 and forms the condenser group, is located hot water system's opposite side. The water-water heat exchanger is provided with a waste hot water inlet 17 and a waste hot water outlet (not shown in the figure), the waste hot water outlet is connected with the evaporator II 4, and the evaporator I2 is provided with a waste water discharge port 20; the refrigeration system is also provided with a compressor I6, a compressor II 7, a gas-liquid separator I8, a gas-liquid separator II 9, a throttle valve I10, a throttle valve II 11, a liquid storage tank I12 and a liquid storage tank II 13, wherein the compressor I6, a condenser I3, the liquid storage tank I12, the throttle valve I10, an evaporator I2 and the gas-liquid separator I8 form a refrigeration loop system in sequence; the compressor II 7, the condenser II 5, the liquid storage tank II 13, the throttle valve II 11, the evaporator II 4 and the gas-liquid separator II 9 form a refrigeration loop system in sequence; an air supply device 14 is arranged on a pipeline 18 between the waste hot water outlet and the evaporator II 4, the air supply device 14 is communicated with the pipeline 18, the air supply device 14 is of a hollow cylindrical structure, a plastic small ball 15 and a hollow small ball guide seat 16 are arranged in the air supply device 14, the diameter of the small ball 15 is larger than that of an upper port of the cylindrical structure, and the small ball 15 moves up and down in a space between the small ball guide seat 16 and the upper port of the cylindrical structure.

Preferably, a connecting end is arranged on a pipeline between the waste hot water outlet and the evaporator II 4, the bottom of the air supplementing device 14 is provided with internal spiral threads, and the air supplementing device 14 is detachably connected to the pipeline 18.

During the in-service use, with air supplement unit 14 through the spiral line connection of its below on pipeline 18 can, when bathing waste water flows through, because of pellet 15 weight is lighter, the last port of air supplement unit 14 is blockked up by bathing waste water jack-up, make whole equipment be in sealed environment, when there is not bathing waste water through air supplement unit 14, pellet 15 falls to on pellet guide holder 16, the air gets into the equipment from the last port of air supplement unit 14, the negative pressure environment in the equipment is destroyed, bathing waste water flows well from the equipment, reduce the production of dirt on the inner wall of evaporimeter and heat exchanger, guaranteed that whole equipment can last high-efficient operation.

Claims (2)

1. A waste heat cascade utilization water source heat pump water heater with an air supply device is sequentially provided with a water-water heat exchanger, an evaporator I, a condenser I, an evaporator II and a condenser II from bottom to top, wherein the evaporator I is connected with the evaporator II in series, the condenser I is connected with the condenser II in series, the water-water heat exchanger is provided with a waste hot water inlet and a waste hot water outlet, the waste hot water outlet is connected with the evaporator II, and the evaporator I is provided with a waste water discharge port; the refrigeration system is characterized by further comprising a compressor I, a compressor II, a gas-liquid separator I, a gas-liquid separator II, a throttle valve I, a throttle valve II, a liquid storage tank I and a liquid storage tank II, wherein the compressor I, the condenser I, the liquid storage tank I, the throttle valve I, the evaporator I and the gas-liquid separator I form a refrigeration loop system in sequence; the compressor II, the condenser II, the liquid storage tank II, the throttle valve II, the evaporator II and the gas-liquid separator II form a refrigeration loop system in sequence; the method is characterized in that: the pipeline between the waste hot water outlet and the evaporator II is provided with an air supplementing device, the air supplementing device is communicated with the pipeline, the air supplementing device is of a hollow cylindrical structure, a plastic small ball and a hollow small ball guide seat are arranged in the air supplementing device, the diameter of the small ball is larger than that of the upper port of the cylindrical structure, and the small ball moves up and down in the space between the small ball guide seat and the upper port of the cylindrical structure.

2. The waste heat cascade utilization water source heat pump water heater with the air supplementing device is characterized in that: and a connecting end is arranged on the pipeline between the waste hot water outlet and the evaporator II, internal spiral lines are arranged at the bottom of the air supply device, and the air supply device is detachably connected on the pipeline.

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