CN204718133U - A shower waste water waste heat recycling and preheating heating structure - Google Patents

Abstract

The utility model relates to a shower waste water waste heat recycling and preheating structure, which is characterized in that the structure comprises a waste water collecting device, a heat pump unit and a preheating device, wherein the waste water collecting device comprises a shower waste water pool, a first water pump and a first filter; the preheating and heating device comprises a heater, a second water pump, a heat pump unit and a one-way valve; the heat pump unit comprises a condenser and an evaporator; one end of the preheating and heating device is provided with a stop valve and a shower nozzle, one end of the evaporator is provided with a waste water outlet, and the bottom of the condenser is provided with a tap water inlet valve and a tap water inlet. The utility model provides a shower waste water waste heat recovery utilizes and preheats the energy-conserving effect of heating structure obvious, and waste water waste heat recovery efficiency is high, and the comfort level is high, the water economy resource, and the practicality is strong, and hot water supply is timely, has higher economic technology benefit.

Description

A shower waste water waste heat recycling and preheating heating structure

technical field

The utility model relates to a shower waste water waste heat recycling and preheating structure. The utility model belongs to the technical field of mechanical manufacturing, and is suitable for the selection of heating efficiency, energy saving effect, wastewater waste heat recovery efficiency, and comfort of shower waste water waste heat recovery and preheating structure selection in electric water heaters.

Background technique

In order to save energy and water, most households use showers for bathing. When showering, the cold tap water is heated to about 42°C for human use, but the temperature of the waste water after the shower is still about 35°C. The waste water containing a lot of heat will be directly Discharged through the sewer, the waste is huge. If the heat in the shower waste water can be recovered to heat tap water, the energy consumption of the water heater can be greatly reduced. But in the process of showering, using the existing electric water heater always needs to wait for a period of time before there will be hot water, and often encounter the situation that the water temperature is cold and hot when showering, the hot water supply is not timely, and the water resources are seriously wasted , The water heater's "instant heating" function is weak. Existing water heaters also use heat exchange tubes for heat exchange, so as to recycle waste heat from shower waste water and improve the waste heat recovery rate of waste water. However, the length of the heat exchange tube is longer and the size is larger, so it is not suitable for small shower rooms.

The heat pump heating process is a process in which the compressor is driven by electric energy to evaporate the refrigerant in the evaporator while absorbing heat from a low-temperature heat source, and then transfer the absorbed heat and the electric energy consumed by the compressor to the heating object in the condenser . The heat pump unit is mainly composed of four parts: a compressor, a condenser, an evaporator and an expansion valve. According to the reverse Carnot cycle principle, the refrigerant operates in a closed manner in the unit, and exchanges heat with the outside through the condenser and evaporator. Under the action of the compressor, the refrigerant completes the process of increasing the pressure and temperature of the gaseous state. After entering the condenser, it releases high-temperature heat to heat the water. After cooling, the temperature drops. After passing through the filter and expansion valve, the pressure drops when it reaches the evaporator, and the liquid state quickly evaporates and absorbs heat. It is transformed into a gaseous state again, and at the same time absorbs heat from the waste water, the temperature of the refrigerant gradually rises, and returns to the compressor to start a new cycle. Such a continuous cycle realizes that the low-temperature residue in the waste water is absorbed by the refrigerant and releases its heat for the second heating of the cold water. The advantage of using compressor heating is that it can realize the transfer of low-temperature heat to high-temperature heat. The traditional conduction heat transfer mode is impossible to realize. The heating efficiency can reach about 300-400%, and the energy-saving effect is obvious.

In summary, in order to solve the problems of untimely hot water supply, serious waste of water resources, large water temperature differences, weak function of "instantly turning on and heating" water heaters, and inconvenient use of existing heat exchange devices in the prior art, it is urgent to invent A shower waste water waste heat recovery and preheating heating structure with remarkable water-saving effect and energy-saving effect, strong instant heating performance, high comfort, water saving, strong practicability, uniform water temperature, and small size.

Utility model content

The utility model proposes a waste heat recovery and preheating structure of shower waste water, which solves the problem of untimely hot water supply, serious waste of water resources, large water temperature difference, weak function of "instantly turning on and heating" of water heaters, and existing replacements in the prior art. Problems such as inconvenient use of heating devices.

The technical scheme of the utility model is achieved in that:

A shower waste water waste heat recovery and preheating structure, characterized in that the structure includes a waste water collection device, a heat pump unit and a preheating heating device, and the waste water collection device includes a shower waste water pool, a first water pump and a first filter The preheating heating device includes a heater, a second water pump, a heat pump unit and a one-way valve; the heat pump unit includes a condenser and an evaporator; one end of the preheating heating device is provided with a shut-off valve and a shower head, One end of the evaporator is provided with a waste water outlet, and the bottom of the condenser is provided with a tap water inlet valve and a tap water inlet.

Further, a compressor, a temperature sensor, an expansion valve and a filter are arranged between the evaporator and the condenser, and the compressor, the temperature sensor, the expansion valve and the filter form a circulation loop through a metal connecting pipe, A refrigerant is arranged in the circulation loop.

A section of the metal connecting pipe passing through the evaporator and the condenser is coiled.

The utility model has the following characteristics and beneficial effects:

The utility model adds a preheating heating device to carry out initial preheating of cold water, so as to realize instant heating. After the cold water is preheated for 30 seconds, hot water can be output, and then in the shower process, the shower wastewater after washing provides heat for the tap water through the heat pump unit, which has a strong energy-saving effect. The entire installation is "self-sufficient" driven by a heat pump unit.

Under the action of the compressor, the refrigerant completes the process of increasing the pressure and temperature of the gaseous state. After entering the condenser, it releases high-temperature heat to heat the water. After cooling, the temperature drops. After passing through the filter and expansion valve, the pressure drops when it reaches the evaporator, and the liquid state quickly evaporates and absorbs heat. It is transformed into a gaseous state again, and at the same time absorbs heat from the waste water, the temperature of the refrigerant gradually rises, and returns to the compressor to start a new cycle. Such a continuous cycle realizes that the heat in the waste water is absorbed by the refrigerant and releases its heat for heating the cold water, which improves the waste heat recovery efficiency of the waste water.

The utility model combines the heat pump unit and the preheating heating device, so that the user does not need to wait for a long time for cold water preheating, and the heat is strong when it is turned on. high degree. The feature of instant heating can also prevent the growth of bacteria in the electric water heater and reduce secondary pollution. The energy-saving effect is remarkable, and the energy consumption can be saved up to 94.6%.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a structural schematic diagram of an embodiment of a shower wastewater waste heat recovery and preheating structure according to the present invention.

In the figure, 1-shower wastewater pool; 2-first water pump; 3-first filter; 4-tap water inlet valve; 5-second filter; 6-expansion valve; 7-temperature sensor; 8-compressor ;9-evaporator; 10-condenser; 11-wastewater outlet; 12-metal connecting pipe; 13-water volume adjustment device; 14-heater; - one-way valve; 19 - tap water inlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to FIG. 1 , a schematic structural diagram of an embodiment of a shower waste water waste heat recovery and preheating structure. The waste heat recovery and preheating structure of shower waste water includes a waste water collecting device, a heat pump unit and a preheating heating device. The waste water collecting device includes a shower waste water pool 1, a first water pump 2 and a first filter 3. The first water pump 2 is a brushless DC water pump with a size of 90mm×99mm×40mm and a model number of 4509, with an input power of 31W and a lift of 9m. The first filter 3 is made of stainless steel mesh.

The preheating heating device includes a heater 14 , a second water pump 17 , a heat pump unit and a one-way valve 18 . The model of one-way valve 18 is 4007, adopts steel to make. The second water pump 17 is a brushless DC water pump with a size of 90mm×99mm×40mm and a model number of 4509, with an input power of 31W and a lift of 9m.

The heat pump unit comprises a condenser 10 and an evaporator 9; the model of the condenser 10 is 118HD020. The model number of the evaporator 9 is 118HD020. A compressor 8 , a temperature sensor 7 , an expansion valve 6 and a filter 5 are arranged between the evaporator 9 and the condenser 10 . The compressor 8 is a scroll compressor with an output power of 1.1kw. The expansion valve 6 is an internally balanced expansion valve with a model number of RF22-φ1.5. The second filter 5 is custom-formed with copper material. The compressor 8, the temperature sensor 7, the expansion valve 6 and the filter 5 form a circulation loop through the metal connecting pipe 12, and a refrigerant is arranged in the circulation loop. The metal connecting pipe 12 adopts a plastic pipe with a diameter of 3 mm and has carried out anti-corrosion treatment.

The refrigerant completes the process of increasing the pressure and temperature under the action of the compressor 8, and then enters the condenser 10 to release high-temperature heat to heat the cold tap water, and then the pressure drops when passing through the filter 5, expansion valve 6, and evaporator 9. Simultaneously absorb heat from shower waste water, get back to compressor 8 and start new circulation.

One end of the preheating heating device is provided with a shut-off valve 15 and a shower nozzle 16, one end of the evaporator 9 is provided with a waste water outlet 11, the bottom of the condenser 10 is provided with a tap water inlet valve 4 and a tap water inlet 19, and the top is provided with Water regulating device 13.

The utility model combines the heat pump unit and the preheating heating device, so that the user does not need to wait for a long time for cold water preheating, and the heat is strong when it is turned on. high degree. The feature of instant heating also makes it difficult for bacteria to breed in the electric water heater, reducing secondary pollution. The energy-saving effect is remarkable, and the energy consumption can be saved up to 94.6%.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (3)

1. A shower wastewater waste heat recovery and preheating heating structure, characterized in that the structure includes a waste water collection device, a heat pump unit and a preheating heating device, and the waste water collection device includes a shower waste water tank, a first water pump and a second water pump A filter; the preheating heating device includes a heater, a second water pump, a heat pump unit and a one-way valve; the heat pump unit includes a condenser and an evaporator; one end of the preheating heating device is provided with a shut-off valve and a shower A spray head, a waste water outlet is provided at one end of the evaporator, and a tap water inlet valve and a tap water inlet are provided at the bottom of the condenser. 2. A shower wastewater waste heat recycling and preheating heating structure according to claim 1, characterized in that a compressor, a temperature sensor, an expansion valve and a filter are arranged between the evaporator and the condenser, and the The above-mentioned compressor, temperature sensor, expansion valve and filter form a circulation loop through metal connecting pipes, and refrigerant is arranged in the circulation loop. 3. A shower wastewater waste heat recovery and preheating structure according to claim 2, characterized in that a section of the metal connecting pipe passing through the evaporator and the condenser is in a spiral shape.