CN113154925A

CN113154925A - Heat recovery device of water heater and control method

Info

Publication number: CN113154925A
Application number: CN202110252158.8A
Authority: CN
Inventors: 淳郊林; 覃宗华; 肖彪
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-07-23
Anticipated expiration: 2041-03-08
Also published as: CN113154925B

Abstract

The application relates to a heat recovery device of a water heater. The device includes: the heat exchange device comprises a manned platform, a heat exchange device and a support structure; the manned platform is provided with a platform plate, a bath water inlet, a cylinder pipeline and a blocking terminal; the support structure includes: the water storage tank body, the lower drainage outlet and the spring structure are arranged; the heat exchange device is arranged inside the water storage tank body; the bath water inlet is arranged on the platform plate, one end of the cylinder pipeline close to the platform plate is communicated with the bath water inlet, and one end of the cylinder pipeline close to the bottom of the supporting structure is connected with the blocking terminal; the manned platform is connected with the supporting structure through a spring structure; the landing slab atress makes spring structure takes place to deform, and the landing slab drives to block up the terminal and sinks, blocks up below drainage export to make bath water import and storage water tank body switch on. The device that this application provided can collect the waste heat water of bathing, once enables to the refrigerant before getting into the compressor, and the refrigerant heats the water of treating the heating again after compressor compression secondary enables, so recycles the heat and provides thermal effective utilization.

Description

Heat recovery device of water heater and control method

Technical Field

The application relates to the technical field of energy utilization, in particular to a heat recovery device of a water heater.

Background

The air source heat pump water heater directly extracts heat from air, is safe and environment-friendly, is flexible to set, is greatly influenced by outdoor temperature, gradually attenuates the heating quantity along with the reduction of the ambient temperature, only adopts an electric heater for heat supplement after the temperature of hot water is heated to a certain temperature value, greatly reduces the working efficiency, and gradually increases the cost along with the reduction of the environmental temperature. Under the low temperature environment, the heat pump is relatively poor with outdoor air heat transfer effect, and along with ambient temperature's decline, heat transfer effect reduces gradually, and when bathing, generally directly arranges the sewer to the water, and the temperature of bathing water is generally higher than more than 20 ℃, directly arranges the waste that leads to the waste heat of sewer.

In order to improve the utilization rate of energy in bathing water, the following technical scheme is provided.

Disclosure of Invention

For overcoming the problem that exists among the correlation technique, this application provides a hot water machine heat reclamation device, this hot water machine heat reclamation device can collect the waste heat water of bathing, then brings the compressor through the heat of refrigerant in with waste heat aquatic, and the refrigerant is after compressor compression is energized, so recycle heat and provide thermal effective utilization.

The present application provides in a first aspect a heat recovery device for a water heater, comprising:

the heat exchange device comprises a manned platform, a heat exchange device and a support structure;

the manned platform is provided with a platform plate, a bath water inlet, a cylinder pipeline and a blocking terminal;

this bearing structure includes: the water storage tank body, the lower drainage outlet and the spring structure are arranged;

the heat exchange device is arranged inside the water storage tank body;

the bath water inlet is arranged on the platform plate, one end of the cylinder pipeline close to the platform plate is communicated with the bath water inlet, and one end of the cylinder pipeline close to the bottom of the supporting structure is connected with the blocking terminal;

the manned platform is connected with the supporting structure through the spring structure;

the platform plate is stressed to enable the spring structure to deform, the platform plate drives the blocking terminal to sink, the lower drainage outlet is blocked, and the bath water inlet is communicated with the water storage tank body.

In a first possible implementation of the first aspect of the present application, the heat exchanging device is provided with a through hole adapted to the cylindrical pipe;

the cylinder pipe passes through the through hole and is arranged in the heat exchange device, and in the vertical direction of the cylinder pipe, the position of the blocking terminal corresponds to the position of the lower drainage outlet.

In a second possible implementation apparatus of the first aspect of the present application, the heat exchange apparatus is provided with a heat exchange temperature sensing bulb and a water level switch;

the support structure is provided with an upper drain opening.

With reference to the second possible implementation of the apparatus of the first aspect, in a third possible implementation of the apparatus, the installation height of the water level switch is greater than the installation height of the heat exchange device.

In a fourth possible implementation of the apparatus according to the first aspect of the present application, the support structure further comprises: the piston holding chamber, the intracavity size in this piston holding chamber and this jam terminal looks adaptation, the side through-hole is provided with around this piston holding chamber, and the bottom in this piston holding chamber is provided with this below drainage export.

In a fifth possible implementation of the first aspect of the present application, the water storage tank comprises a first water storage tank and a second water storage tank, and the second water storage tank is disposed in the first water storage tank.

In a sixth possible implementation of the apparatus of the first aspect of the present application, the connecting the end of the column conduit near the bottom of the support structure with the blocking terminal comprises: one end of the column pipeline, which is close to the bottom of the supporting structure, is connected with the blocking terminal through a K column structure, the blocking terminal is provided with a side through hole, and the K is an integer greater than 1.

In combination with the first aspect, a heat recovery device for a water heater is provided, and a second aspect of the present application provides a heat recovery control method for a water heater, including:

acquiring a water storage level and a water storage temperature, wherein the water storage level is the height of the water level of the waste hot water in the water storage tank body, and the water storage temperature is the temperature of the waste hot water in the water storage tank body;

comparing the water storage level with a water storage level threshold corresponding to the water storage level, and comparing the water storage temperature with a water storage temperature threshold corresponding to the water storage temperature;

if the water storage level is greater than or equal to the water storage level threshold and the water storage temperature is greater than or equal to the water storage temperature threshold;

the refrigerant valve is controlled to make the refrigerant flow into the heat recovery device for heat recovery and then flow into the compressor of the hot water machine, and the valve is used for controlling the flow rate and the flow direction of the refrigerant.

In a first possible implementation of the second aspect of the present application, the refrigerant valve includes a first electronic expansion valve, a second electronic expansion valve, and a solenoid valve.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the first electronic expansion valve is disposed on a refrigerant pipe connecting the condenser and the evaporator;

the second electronic expansion valve is arranged on a refrigerant pipe connecting the heat recovery device and the compressor;

the electromagnetic valve is arranged on a refrigerant pipe connecting the evaporator and the compressor.

With reference to the second possible implementation method of the second aspect, in a third possible implementation method, the controlling a refrigerant valve to enable the refrigerant to flow into a heat recovery device for heat recovery, and then flow into a compressor of a hot water machine includes:

the electromagnetic valve is controlled to be closed, the first electronic expansion valve is controlled to gradually increase the opening degree, and the second electronic expansion valve is controlled to gradually increase the opening degree, so that the refrigerant flows into the heat recovery device for heat recovery and then flows into the compressor of the water heater.

With reference to the second possible implementation method of the second aspect, in a fourth possible implementation method, after controlling the refrigerant valve to make the refrigerant flow into the heat recovery device for heat recovery and then flow into the compressor of the hot water machine, the method further includes:

monitoring the water storage level and the water storage temperature;

comparing the current water storage level with the water storage level N seconds ago, and comparing the water storage water temperature with the water storage water temperature threshold, wherein N is more than 0;

if the current water storage level is less than the water storage level before the N seconds or the water storage temperature is less than the water storage temperature threshold;

the electromagnetic valve is controlled to be opened, the first electronic expansion valve is controlled to gradually reduce the opening degree to the initial step number, the second electronic expansion valve is controlled to gradually reduce the opening degree until the second electronic expansion valve is closed, and the refrigerant directly flows into the compressor of the water heater after flowing into the evaporator.

With reference to the third or fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the controlling the electromagnetic valve to close or open includes:

and after M seconds, controlling the electromagnetic valve to be switched from the open state to the closed state or controlling the electromagnetic valve to be switched from the closed state to the open state, wherein M is an integer greater than 1.

In a sixth possible implementation method of the second aspect, the obtaining of the stored water level and the stored water temperature further includes:

acquiring the outdoor environment temperature;

comparing the outdoor environment temperature with an environment temperature threshold corresponding to the outdoor environment temperature;

if the outdoor ambient temperature is less than the ambient temperature threshold.

The technical scheme provided by the application can comprise the following beneficial effects:

the application relates to a heat recovery device of a water heater. The device includes: the heat exchange device comprises a manned platform, a heat exchange device and a support structure; the manned platform is provided with a platform plate, a bath water inlet, a cylinder pipeline and a blocking terminal; the support structure includes: the water storage tank body, the lower drainage outlet and the spring structure are arranged; the heat exchange device is arranged inside the water storage tank body; the bath water inlet is arranged on the platform plate, one end of the cylinder pipeline close to the platform plate is communicated with the bath water inlet, and one end of the cylinder pipeline close to the bottom of the supporting structure is connected with the blocking terminal; the manned platform is connected with the supporting structure through a spring structure; the landing slab atress makes spring structure takes place to deform, and the landing slab drives to block up the terminal and sinks, blocks up below drainage export to make bath water import and storage water tank body switch on. The device that this application provided can collect the waste heat water of bathing, then brings the compressor through the heat of refrigerant in with waste heat aquatic, and the refrigerant is after compressor compression is energized, so recycle heat provides thermal availability.

The technical scheme of this application's beneficial effect still includes:

according to the technical scheme, after a manned platform with a human body bearing function sinks and a heat exchanger water storage switch is triggered to be closed to enable a heat exchanger to enter a waste heat water storage mode, the water level height of waste hot water in the heat exchanger and the temperature of the waste hot water in the heat exchanger are obtained, then the water storage water level is compared with a water storage water level threshold value, and the water storage temperature is compared with a water storage temperature threshold value; and controlling a valve according to the comparison result to enable the refrigerant to flow into the heat exchanger and then flow into the compressor of the water heater, wherein the valve is used for controlling the flow rate and the flow direction of the refrigerant. This scheme is through detecting the people and getting into when the state of bathing, and the waste heat water of will bathing is collected, and when the heat of the waste heat aquatic of collecting was enough many, gives the refrigerant with the heat transfer in the waste heat aquatic, makes the refrigerant before getting into the compressor just have more heat, after compressor compression energized, gives the water of treating the heating with the heat transfer again, so recycle the heat and improved thermal effective utilization.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a schematic structural diagram of a heat recovery device of a water heater according to an embodiment of the present application;

FIG. 2 is another schematic structural diagram of a heat recovery device of a water heater according to an embodiment of the present disclosure;

FIG. 3 is a schematic flow chart illustrating a heat recovery control method for a water heater according to an embodiment of the present disclosure;

FIG. 4 is another schematic flow chart diagram illustrating a heat recovery control method for a water heater according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a heat recovery control system of a water heater according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view illustrating a connection relationship between a blocking terminal and a lower drain port in the heat recovery device of a water heater according to the embodiment of the present application.

Fig. 7 is a general flow path diagram of waste hot water in a hot water machine heat recovery device according to an embodiment of the present application.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The heat exchange effect between the hot water machine and the outdoor air is reduced along with the reduction of the ambient temperature, and the temperature of bath water discharged into a sewer under the condition is generally higher than 20 ℃, so that a large amount of reserved heat is carried, and the energy is wasted.

To above-mentioned problem, this application embodiment provides a hot water machine heat reclamation device, can improve the utilization ratio of the aquatic energy of bathing.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a heat recovery device of a water heater according to an embodiment of the present application.

Referring to fig. 1, the present application provides a heat recovery device for a water heater, comprising: the device comprises a manned platform 101, a heat exchange device 102 and a supporting structure 103, wherein a platform plate 104, a bath water inlet 105, a cylinder pipeline 106 and a blocking terminal 107 are arranged on the manned platform 101, and a water storage tank body 108, a lower drainage outlet 109 and a spring structure 110 are arranged on the supporting structure 103. Heat transfer device sets up in the inside of storing up the water tank body, and the landing slab setting is on the top of storing up the water tank body, and the import of bathing water sets up on the landing slab, the one end that is close to the landing slab of cylinder pipeline with the import intercommunication of bathing water, the one end that is close to bearing structure's bottom of cylinder pipeline is connected with the jam terminal, and manned platform passes through spring structure and is connected with bearing structure, and the landing slab atress makes spring structure takes place to deform, and the landing slab drives and blocks up the terminal and sinks, plugs up below drainage export to make the import of bathing water and storage water tank body switch on.

The platform plate can be steel plate or plastic slab, and specific size is set for according to the area of user's bathroom, and the specific size of hot water machine heat recovery unit also sets for according to user's bathroom or user's actual demand.

The heat exchanger is provided with a refrigerant pipe, the length and the layout of the refrigerant pipe in the heat exchanger are determined according to the capacity of the water storage tank body, and the residual heat in waste hot water can be ensured to be transferred to the refrigerant as much as possible.

The number of spring structure is generally four, sets up in the four corners position of storage water tank body, but also can suitably increase according to the weight of specific landing slab to guarantee that the landing slab is under the state of not atress, the top parallel and level of its upper plane and storage water tank body.

The blocking terminal can be set to be a rubber block, the size of the blocking terminal is matched with the size of the lower water outlet, the lower water outlet can be completely blocked after the block sinks, and bathing water is prevented from directly flowing into a sewer from the lower water outlet.

When a person stands on the platform plate for bathing, the platform plate is stressed, and the spring connected with the platform plate is stressed and deformed, so that the platform plate is integrally sunk, and the blocking terminal connected with the platform plate through the cylinder pipeline is sunk, and the blocking terminal is sunk and just blocks the lower water outlet arranged at the bottom of the water storage tank body, so that the bathing water which is once used cannot directly flow into the lower water outlet through the cylinder pipeline through the bathing water inlet arranged on the platform plate, but is blocked by the blocking terminal and retained in the water storage tank body, when the waste hot water stored in the water storage tank body is soaked in the heat exchange device arranged in the water storage tank body, the refrigerant is introduced into the refrigerant pipeline arranged in the heat exchange device, most of heat remained in the waste hot water is absorbed through the refrigerant, and the refrigerant enters the compressor for compressing and enabling the energy after absorbing the part of heat, finally, heat is conventionally given to the water to be heated.

For ease of understanding, another embodiment of a heat recovery device of a water heater is provided below, and referring to fig. 2, 6 and 7, an embodiment of the present application provides a heat recovery device of a water heater, including:

while the above embodiment 1 has shown the main components of the water heater heat recovery device and the functional implementation of the main components, the following embodiment will show a water heater heat recovery device with more detailed features.

In the embodiment of the present application, the heat recovery device of the water heater comprises: manned platform 201, heat transfer device 202 and bearing structure 203, manned platform 201 is last to be provided with landing slab 204, bath water inlet 205, cylinder pipeline 206, cylinder structure 207 and block up terminal 208, and bearing structure 203 includes: the water-saving heat exchanger comprises a first water storage tank body 209, a second water storage tank body 210, a lower drainage outlet 211, a spring structure 212 and a heat exchanger fixing metal plate 213, wherein a through hole 214, a refrigerant inlet 215, a refrigerant outlet 216, a heat exchange temperature sensing bulb 217, a water level switch 218 and a fixing metal plate 219 are arranged on the heat exchanger 202. Heat transfer device sets up the inside at the second water storage box, the bath water import sets up on the landing slab, the one end and the bath water import intercommunication of the one end that is close to the landing slab of cylinder pipeline, the one end of the bottom that is close to bearing structure of cylinder pipeline is passed through 4 column structures and is blocked up the terminal and be connected, manned platform passes through spring structure and is connected with bearing structure, the landing slab atress makes spring structure take place to deform, the landing slab drives and blocks up the terminal and subsides, because of blocking up the terminal and being connected the face of cylinder structure totally closed, take place to sink the back, it forms the separation to block up totally closed connection face on the terminal between second water storage box and the below drainage outlet of setting in first water storage line body bottom, make waste hot water directly flow into the second water storage box from the clearance between the column structure after the bath water import enters into the cylinder pipeline, begin to save. .

The size of the through hole on the heat exchange device is matched with the size of the cylinder pipeline, the position of the through hole on the heat exchange device corresponds to the position of the cylinder pipeline on the platform plate, the through hole is penetrated during installation of the cylinder pipeline, and after the installation is completed, the position of the blocking terminal connected with the cylinder pipeline corresponds to the position of the water outlet below.

The installation height of the water level switch is greater than that of the heat exchange device, so that the water level switch can form a passage when contacting water, the heat exchange device is soaked in the waste hot water in the second water storage tank body, the quantity of the waste hot water in the water storage tank body reaches the recoverable degree at the moment, and the refrigerant is introduced for heat recovery.

The heat exchange temperature sensing package is arranged near the refrigerant inlet and is used for reading the temperature of the waste hot water in real time, when the temperature of the waste hot water reaches a set threshold value, and the refrigerant is introduced into the heat exchange device when the water level switch forms a passage, so that the heat in the waste hot water is better guaranteed to be worth performing heat recovery.

The heat exchange device is also provided with refrigerant pipelines which are uniformly distributed and used for introducing refrigerants to carry out heat exchange with waste hot water, the refrigerant inlet is connected with the evaporator through a refrigerant pipe, the refrigerant outlet is connected with the compressor through a refrigerant pipe, and the refrigerant inlet and the refrigerant outlet are communicated through a refrigerant pipe arranged in the heat exchange device.

The fixed panel beating on the heat transfer device cooperates installed part heat transfer device with the fixed panel beating of heat exchanger on fixing the take the altitude in the second water storage tank, and concrete height is confirmed according to the concrete capacity of water storage tank, but when guaranteeing that the water level height of useless hot water in the water storage tank reaches heat transfer device's mounting height, has sufficient heat to provide the refrigerant among the heat transfer device.

The water storage tank body comprises a first water storage tank body and a second water storage tank body, the second water storage tank body is arranged in the first water storage tank body, the second water storage tank body is connected with the first water storage tank body through four supporting sheet bodies arranged at the bottom in the first water storage tank body, a certain gap is formed between the outer periphery of the second water storage tank body and the inner periphery of the first water storage tank body, the heat exchange device is arranged in the second water storage tank body, and a certain gap is formed between the heat exchange device and the second water storage tank body. The height of first water storage tank is higher than the height of second water storage tank, so useless hot water flows into the second water storage tank from the cylinder pipeline and saves, will take place to spill over when the water level height of useless hot water in the second water storage tank equals the height of second water storage tank, flows into in the first water storage tank from the clearance all around between first water storage tank and the second water storage tank. And the heat exchange device is arranged in the middle of the second water storage tank body, and the waste hot water enters from the bottom of the second water storage tank body, so that the incoming waste hot water can be ensured to be gradually transferred from bottom to top, namely, the heat exchange is carried out according to the sequence of the waste hot water entering the water storage tank body, and the heat recovery efficiency is ensured.

The supporting structure is further provided with a piston accommodating cavity 601, the size of the cavity of the piston accommodating cavity is matched with the blocking terminal 602, four side through holes 603 are formed in the periphery of the piston accommodating cavity, after the blocking terminal sinks, the side through holes 604 formed in the blocking terminal and the side through holes 603 of the piston accommodating cavity coincide to form conduction, and the lower portion of the piston accommodating cavity is communicated with a lower water outlet 605 formed in the bottom of the first water storage tank body. The lateral through hole of the piston accommodating cavity is connected with a water guide groove 606 which is arranged at the inner bottom of the first water storage tank body. After the waste hot water overflowing from the second water storage tank body enters the first water storage tank body, the waste hot water flows to the lateral through holes from the periphery of the bottom of the first water storage tank body under the guiding of the water guide grooves, the lateral through holes are communicated with the lateral through holes blocking the terminals at the moment, and the lateral through holes are communicated with the lower water outlet, so that the waste hot water flows to the lateral through holes and then flows to the lower water outlet, and finally flows into a sewer connected with the lower water outlet, the water guide grooves are arranged to ensure the emptying of the waste hot water in the first water storage tank body and increase the speed of discharging the waste hot water.

The working principle of the heat recovery device is as follows: when no one stands, the platform plate is lifted by the spring to drain water in the water tank; when a human body stands on the platform, the spring structure is stressed by the gravity of the human body and the platform sinks, the blocking terminal blocks a waste hot water channel between the second water storage tank body and a lower water outlet, the water level of the waste hot water in the second water storage tank body gradually rises, the water level switch is switched on, and when the temperature of the T heat exchange temperature sensing bulb is detected to meet the opening condition, the T heat exchange temperature sensing bulb is opened to operate according to control logic, when the height of the waste hot water level is equal to that of the second water storage tank body, the heat exchange water overflows from the top of the second water storage tank body, and finally flows out through the lower water outlet and is discharged into a floor drain; when a human body leaves, the manned platform is lifted by the spring structure, the blocking terminal is lifted, the waste hot water channel between the second water storage tank body and the water outlet at the lower part is communicated to quickly drain the waste hot water in the second water storage tank body of the water tank, the water level is lowered, the water level switch is switched off, and the unit exits from the heat recovery mode.

The specific implementation method for realizing heat recovery by the heat recovery device comprises the following steps: when a person stands on the platform plate for bathing, the platform plate is stressed, and the spring connected with the platform plate is stressed and deformed, so that the whole platform plate sinks, and the blocking terminal 602 connected with the platform plate through the cylinder pipeline 607 and the cylinder structure 608 sinks, and the blocking terminal 602 sinks to just block the lower water outlet 605 arranged below the piston accommodating cavity 601, so that the once-used bathing water cannot directly flow into the lower water outlet through the cylinder pipeline through the bathing water inlet arranged on the platform plate, but is blocked by the blocking terminal and is intercepted in the second water storage tank body, when the water level switch forms a passage and the temperature read by the heat exchange temperature sensing bag reaches a set temperature threshold value, the residual heat in the waste heat water is worth recovering, the refrigerant is introduced into the refrigerant pipeline arranged in the heat exchange device, and most of the residual heat in the waste heat water is absorbed by the refrigerant, after absorbing the heat, the refrigerant enters the compressor to be compressed and energized, and finally the heat is conventionally supplied to the water to be heated.

When nobody stands, rise the landing slab by the spring to lead to rising no longer blockking up the below outlet through the jam terminal that cylinder pipeline and landing slab are connected, the useless hot water of storage in the second water storage tank directly flows to the below outlet from piston holding chamber, flows into the sewer from the below outlet at last.

The flow path of the waste hot water in the heat recovery device of the water heater is as follows: the bath water enters the cylinder pipe from the bath water inlet and flows to the cylinder structure through the flow path 701, flows into the bottom of the second water storage tank through the gap between the cylinder structures and flows along the flow path 702 to be stored, the water level gradually rises, flows upwards along the flow path 703 through the gap between the heat exchange device and the second water storage tank, flows along the flow path 704 to completely cover the heat exchange device after spreading on the top of the heat exchange device along the flow path 704, then the water level continuously rises and flows upwards along the flow path 705, when the water level is higher than the height of the second water storage tank, overflow occurs along the flow path 706, flows to the bottom of the first water storage tank along the flow path 707 after overflow, then flows into the side through hole of the blocking terminal along the flow path 708, and finally flows to the sewer outlet along the flow path 709.

The device is selected and matched by a user, the valve interface is reserved at the outer machine end, and the heat recovery function can be set to be opened or closed in the display panel engineering setting. When the hot water receiving device is normally installed, the hot water receiving device is started after engineering setting debugging is normal, the display panel displays relevant information of the heat recovery function, and a user can set whether to start the heat recovery function or to start the heat recovery function in a standby state.

In the embodiment of the present application, the heat recovery device of the water heater comprises: manned platform, heat transfer device and bearing structure are provided with landing slab, bath water inlet, cylinder pipeline and jam terminal on the manned platform, and bearing structure includes: the water level switch comprises a first water storage tank body, a second water storage tank body, a lower drainage outlet, a spring structure and a heat exchange device fixing metal plate, wherein the heat exchange device is provided with a through hole, a refrigerant pipeline, a refrigerant inlet and outlet, a heat exchange temperature sensing bag, a water level switch and the fixing metal plate. Heat transfer device sets up the inside at the second storage water tank body, the bath water import sets up on the landing slab, the one end and the bath water import intercommunication of being close to the landing slab of cylinder pipeline, the cylinder structure is passed through to the one end that is close to bearing structure's bottom of cylinder pipeline and is connected with the jam terminal, manned platform passes through spring structure and is connected with bearing structure, the landing slab atress makes spring structure take place to deform, the landing slab drives and blocks up the terminal and subsides, plug up the below drainage export, and make bath water import and second storage water tank body directly switch on.

The device that this application provided, can collect the waste hot water of bathing, then assess the waste hot water's in the water storage box body volume through water level switch, monitor waste hot water's temperature through heat transfer temperature sensing package, through combining waste hot water's volume and temperature, judge whether enough the heat in the waste hot water of collecting is, if then energize once to the refrigerant before the entering compressor, the refrigerant heats the water of treating the heating after the compressor compression secondary is energized, so recycle the heat provides thermal effective utilization.

Corresponding to the embodiment of the heat recovery device of the water heater, the application also provides a corresponding embodiment of a heat recovery control method of the water heater.

Fig. 3 is a flowchart illustrating a heat recovery control method for a water heater according to an embodiment of the present disclosure. Referring to fig. 3, an embodiment of a heat recovery control method of a water heater according to an embodiment of the present application includes:

in the embodiment of the application, the heat recovery device of the water heater is arranged in the water heater system, and the control method of heat recovery is specifically realized.

301. Acquiring a water storage level and a water storage temperature, wherein the water storage level is the height of the water level of the waste hot water in the water storage tank body, and the water storage temperature is the temperature of the waste hot water in the water storage tank body;

in this application embodiment, realize acquireing the information of water storage water level through water level switch, the water level information that here acquireed is the water level when water storage water level reachs water level switch mounting height, shows to take place to communicate for water level switch, is greater than water level switch mounting height for actual water storage water level all the time simultaneously, shows to be that water level switch is in the connected state all the time.

The stored water temperature is obtained through a heat exchange temperature sensing bulb in the hot water machine heat recovery device, and the heat exchange temperature sensing bulb can monitor the temperature of the waste hot water all the time.

302. Comparing the water storage level with a water storage level threshold corresponding to the water storage level, and comparing the water storage temperature with a water storage temperature threshold corresponding to the water storage temperature;

in the embodiment of the application, the water storage water level threshold is the installation height of the water level switch in the water storage tank, and the water storage temperature threshold is the temperature of the waste hot water which is triggered to be subjected to heat recovery in advance, because the working energy consumption of the water heater is smaller than that of the water heater in a non-heat recovery state only when the temperature of the waste hot water reaches a certain temperature to carry out heat recovery, so that the meaningful energy utilization rate improvement can be realized.

303. If the water storage level is greater than or equal to the water storage level threshold and the water storage temperature is greater than or equal to the water storage temperature threshold, controlling a refrigerant valve to enable the refrigerant to flow into a heat recovery device for heat recovery and then flow into a compressor of a hot water machine, wherein the valve is used for controlling the flow and the flow direction of the refrigerant;

in the embodiment of the application, when the water storage level is greater than or equal to the water storage level threshold value, the water level switch is used for representing that the passage is formed, and when the water storage temperature is greater than or equal to the water storage temperature threshold value, the heat in the waste heat water is enough, and when the two conditions are simultaneously reached, the heat recovery is represented. At this moment, the flow direction and the flow rate of the refrigerant can be changed by controlling a refrigerant valve arranged on a refrigerant pipeline, so that the refrigerant which flows through the evaporator and then flows into the compressor for compression is changed into the following steps: flows into the heat recovery device of the water heater after flowing through the evaporator and then flows into the compressor for compression.

According to the technical scheme, after a manned platform with a human body bearing function sinks and a heat exchanger water storage switch is triggered to be closed to enable a heat exchanger to enter a waste heat water storage mode, the water level height of waste hot water in the heat exchanger and the temperature of the waste hot water in the heat exchanger are obtained, then the water storage water level is compared with a water storage water level threshold value, and the water storage temperature is compared with a water storage temperature threshold value; and if the water storage water level is greater than or equal to the water storage water level threshold and the water storage temperature is greater than or equal to the water storage temperature threshold, controlling a refrigerant valve to enable the refrigerant to flow into a heat recovery device for heat recovery and then flow into a hot water machine compressor. This scheme is through getting into when bathing the state at the people, and the waste heat water of will bathing collects, through the evaluation condition of water storage water level and water storage temperature as thermal volume, when the heat of the waste heat aquatic of collecting is enough many, gives the refrigerant with the heat transfer in the waste heat aquatic, makes the refrigerant just have more heat before getting into the compressor, after compressor compression is energized, gives the water of waiting to heat with the heat transfer again, so recycle the heat and improved thermal effective utilization.

For convenience of understanding, an application example of the heat recovery control method of the water heater is provided below, and referring to fig. 4 and 5, an example of the heat recovery control method of the water heater in the embodiment of the present application includes:

in the embodiment of the present application, the complete control flow of the heat recovery control method of the water heater will be shown.

401. Acquiring the outdoor environment temperature;

in the embodiment of the application, the outdoor environment temperature is acquired in real time by installing a temperature sensing bulb on the evaporator.

402. Comparing the outdoor environment temperature with an environment temperature threshold corresponding to the outdoor environment temperature to obtain a first comparison result;

the set standard of the ambient temperature threshold is that below the temperature, the heat exchange effect of the water heater and the air is extremely low, the heating capacity is low, and enough heat cannot be obtained from the air to effectively heat the water to be heated.

In the embodiment of the present application, two environment temperature thresholds are set, one is 10 degrees celsius, and the other is 0 degrees celsius, and the obtained outdoor environment temperature is compared with the two set outdoor environment temperature thresholds, and the obtained results are divided into three types, which are: the temperature is lower than 0 ℃, equal to or higher than 10 ℃, and equal to or higher than 0 ℃ and lower than 10 ℃.

When the obtained result is two, the heat recovery mode is not entered; and when the obtained result is (i) or (iii), performing differential control according to the working state of the water heater unit to enter a heat recovery mode.

403. Acquiring a water storage level and a water storage temperature, wherein the water storage level is the height of the water level of the waste hot water in the water storage tank body, and the water storage temperature is the temperature of the waste hot water in the water storage tank body;

the result obtained in step 403 is (r) or (c), which means that the heat recovery mode can be entered. At the moment, if the user enters a bathing mode, the platform plate sinks to block the lower water outlet due to the fact that the terminal is blocked, the water storage tank body starts to store water, and then the water storage level and the water storage temperature are obtained.

In this application embodiment, through set up a buoy passageway in the storage water tank body, acquire the storage water level in real time, the storage water temperature is acquireed through the heat transfer temperature sensing package that sets up on heat transfer device.

404. Comparing the water storage level with a water storage level threshold corresponding to the water storage level, and comparing the water storage temperature with a water storage temperature threshold corresponding to the water storage temperature to obtain a second comparison result;

in the embodiment of the present application, the setting standard of the water storage level threshold is as follows: when the water level of the stored water reaches the water level, the quantity of the waste hot water in the water storage tank body is enough, the heat exchange device can effectively exchange heat with the stored waste hot water, the threshold value of the water storage temperature is the preset temperature of the waste hot water for triggering heat recovery, and the working energy consumption of the water heater is smaller than that of the water heater in a non-heat recovery state only when the temperature of the waste hot water reaches a certain temperature for heat recovery, so that the meaningful energy utilization rate improvement can be realized. The results obtained by comparison are divided into two types, namely: and fourthly, when the obtained result shows that the heat recovery mode is not carried out or the heat recovery mode exits, and when the obtained result shows that the heat recovery mode is not carried out or the heat recovery mode exits, the heat recovery mode is entered or the heat recovery mode is kept.

405. Combining the first comparison result and the second comparison result to control a refrigerant valve to enable the refrigerant to flow into a heat recovery device for heat recovery and then flow into a hot water machine compressor, wherein the valve is used for controlling the flow and the flow direction of the refrigerant;

the refrigerant valves comprise a first electronic expansion valve 501, a second electronic expansion valve 506 and an electromagnetic valve 508, the first electronic expansion valve is arranged on a refrigerant pipe connecting a condenser 502 and an evaporator 509, the condenser 502 is arranged in a water tank for storing cold water to be heated, and the evaporator 509 is provided with a fan 510 for accelerating air flow and increasing evaporation efficiency; the second electronic expansion valve 506 is arranged on a refrigerant pipe connecting the hot water machine heat recovery device 507 and the compressor, a four-way valve 503 is further arranged between the second electronic expansion valve 506 and the compressor 505, one end of the four-way valve 503 is connected with a refrigerant inlet of the compressor, one end of the four-way valve is connected with a refrigerant outlet of the compressor, the other end of the four-way valve is connected with the condenser 502, and the other end of the four-way valve is connected with the heat recovery device 507 and the evaporator 509; the solenoid valve 503 is provided in a refrigerant pipe connecting the evaporator 509 and the compressor 505, and a four-way valve 503 is further provided between the solenoid valve 508 and the compressor 503.

In the normal heating mode of the water heater, the working process is that the compressor compresses the refrigerant evaporated by the evaporator at low temperature and low pressure into the refrigerant at high temperature and high pressure, the refrigerant is transmitted into a condenser arranged in a water tank 504 for storing water to be heated to exchange heat with the water to be heated, the refrigerant is changed into the refrigerant at low temperature and high pressure after the heat is transferred to the water to be heated, the refrigerant is evaporated by the evaporator to be changed into the refrigerant at low temperature and low pressure, and the steps are circularly performed to carry out normal heating.

In the heat recovery heating mode, the working process is that the refrigerant which is compressed and high-temperature and high-pressure gas subjected to primary energization by the heat recovery device 507 is transmitted into a condenser 502 arranged in a water tank for storing water to be heated to exchange heat with the water to be heated, heat is transferred to the water to be heated, the refrigerant is changed into the refrigerant with low temperature and high pressure, the refrigerant is evaporated by an evaporator to be changed into the refrigerant with low temperature and low pressure, and then the refrigerant is transferred to the heat recovery device to be energized for one time, and the steps are circularly performed to heat.

In the embodiment of the application, when the first comparison result is (i) or (iii) and the second comparison result is (v), the electromagnetic valve is controlled to be closed, the first electronic expansion valve is controlled to gradually increase the opening degree, and the second expansion valve is controlled to gradually increase the opening degree, so that the refrigerant which directly flows into the compressor from the evaporator flows into the heat recovery device after being rerouted to flow through the evaporator and then flows into the compressor for compression.

The following are exemplary: when the compressor is in an operating state, the external environment temperature is less than 10 ℃, the water storage level is greater than the water storage level threshold, and the water storage temperature is greater than the water storage temperature threshold, the heat recovery mode is entered, the second electronic expansion valve is controlled to be gradually opened from 0B to an initial step number of 120B, the first electronic expansion valve is continuously adjusted according to the target superheat degree, the electromagnetic valve is controlled to be closed after 20s, the opening of the first electronic expansion valve is controlled to be as large as 480B, and the second electronic expansion valve is adjusted according to the superheat degree after 10 s.

When the compressor is in a standby state, the external environment temperature is less than 0 ℃, the water storage water level is greater than the water storage water level threshold value, and the water storage temperature is greater than the water storage temperature threshold value, the second electronic expansion valve is controlled to be gradually opened from 0B to 120B in the initial steps, the electromagnetic valve is controlled to be closed after 20s, the opening degree of the first electronic expansion valve is opened to 480B, the external fan is started after 60s, the compressor is started after 20s, and the second electronic expansion valve is adjusted according to the superheat degree after 120 s.

In order to avoid starting the compressor, the compressor enters a refrigerant adjusting valve in a heat recovery mode without completely establishing pressure difference, and the comparison condition can be changed into that the water storage level is greater than the water storage level threshold value within 2 continuous minutes in the running state of the compressor; meanwhile, in the standby state of the compressor, the comparison condition can be changed into the condition that the water storage level is greater than the water storage level threshold value within 1 continuous minute, the time for 1 minute is the normal detection time, and the actual continuous time needs to be adjusted correspondingly according to the actual working condition.

The target superheat degree here relates to the suction temperature, the outer unit tube temperature, the ambient temperature, and when the suction-tube temperature is less than the target superheat degree a, the target superheat degree is adjusted downward every X seconds; when the temperature of the suction pipe is higher than the target superheat degree A, adjusting the temperature upwards every X seconds; and when A is less than or equal to the actual superheat Tr is less than or equal to B, maintaining the opening of the current electronic expansion valve. And (4) at different ring temperatures, the target superheat degrees are inconsistent, and the specific numerical value is determined through testing. The initial step number is determined by the environment temperature, and corresponding electronic expansion valves are inconsistent in different environment temperature sections and need to be matched and determined after testing.

406. Monitoring the stored water level and the stored water temperature;

in the embodiment of the application, after the heat recovery mode is entered, the water storage level and the water storage temperature are continuously monitored.

407. Comparing the current water storage level with the water storage level N seconds ago, and comparing the water storage temperature with the water storage temperature threshold, wherein N is greater than 0;

in order to ensure whether the current state of the hot water is suitable for continuously keeping the heat recovery mode, the current water storage level and the water storage level N seconds ago are compared, and the water storage temperature threshold are compared. The specific value of N can be determined according to actual working conditions.

408. Controlling a refrigerant valve according to the comparison result;

and if the current water storage level is less than the water storage level before N seconds or the water storage temperature is less than the water storage temperature threshold value, the electromagnetic valve is controlled to be opened, the first electronic expansion valve is controlled to gradually reduce the opening degree to the initial step number, the second electronic expansion valve is controlled to gradually reduce the opening degree until the second electronic expansion valve is closed, and the refrigerant directly flows into the water heater compressor after flowing into the evaporator.

When the detected water storage temperature is lower than 5 ℃, the heat exchange temperature sensing bulb is broken down, and the heat recovery mode is exited at the moment.

And if the current water storage level is greater than or equal to the water storage level before N seconds and the water storage temperature is greater than or equal to the water storage temperature threshold value, continuing to maintain the heat recovery mode.

The following are exemplary: and after receiving a comparison result program and sending an instruction of exiting the heat recovery mode, controlling the electromagnetic valve to be opened, controlling the second electronic expansion valve to be gradually reduced to 90B, controlling the first electronic expansion valve to be gradually reduced to the initial step number, controlling the second electronic expansion valve to be gradually reduced to 0B after 5s, and controlling the first electronic expansion valve to be controlled according to the superheat degree after 120 s.

409. Detecting the temperature of the water to be heated;

in the embodiment of the application, a temperature sensing bulb is arranged in a water tank for storing water to be heated and is used for detecting the temperature of the water to be heated.

410. Comparing the temperature of the water to be heated with a set water temperature;

the set water temperature is the temperature to which the water to be heated is required to be heated and is set by a user.

In the heat recovery mode, if the temperature of the water to be heated is greater than or equal to the set water temperature, the compressor is controlled to stop, the fan is controlled to stop after 60s, the electromagnetic valve is controlled to be opened after 60s, the first electronic expansion valve is closed to the initial step number, the second electronic expansion valve is closed to 0B, and otherwise, the original heating mode is continuously maintained.

And under the normal heating mode, if the temperature of the water to be heated is greater than or equal to the set water temperature, controlling the unit to enter a standby mode, otherwise, continuously keeping the original heating mode.

The technical proposal obtains the outdoor environment temperature, the water storage level and the water storage temperature, then compares the outdoor environment temperature, the water storage level and the water storage temperature with respective threshold values, when the comparison result accords with the condition of entering the heat recovery mode, the refrigerant valve is controlled to lead the refrigerant to flow into the heat recovery device for heat recovery, then flows into a compressor of a hot water machine to be compressed, continues to monitor the water level and the temperature of the stored water after the heat recovery mode is carried out, and judging whether to continue to maintain the heat recovery mode or not according to the conditions of the heat recovery mode and the normal heating mode, if not, controlling a refrigerant valve to enable the refrigerant to directly flow into a hot water machine compressor for compression after flowing into an evaporator, detecting the temperature of the water to be heated no matter the heat recovery mode or the normal heating mode is maintained, if the temperature of the water to be heated is equal to or greater than the set temperature, exiting the normal heating mode or entering the standby mode in the heat recovery mode, otherwise, continuing to maintain the original mode for working. This scheme is through combining outdoor ambient temperature as a logical operation decision factor of hot water machine heat recovery control method, so can realize under low temperature environment, uses heat recovery unit to carry out recycle to the heat of bathing aquatic, through improving the unit temperature of breathing in, improves the heat transfer volume of unit, reaches the effect that reduces the energy consumption.

The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.

Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the applications disclosed herein may be implemented as electronic hardware, computer software, or combinations of both.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A heat recovery device of a water heater, comprising:

the support structure includes: the water storage tank body, the lower drainage outlet and the spring structure are arranged;

the heat exchange device is arranged inside the water storage tank body;

the bath water inlet is formed in the platform plate, one end, close to the platform plate, of the cylinder pipeline is communicated with the bath water inlet, and one end, close to the bottom of the supporting structure, of the cylinder pipeline is connected with the blocking terminal;

the landing slab atress makes the spring structure takes place to deform, the landing slab drives it sinks to block up the terminal, blocks up below drainage export, and makes the bath water import with the storage water tank body switches on.

2. The water heater heat recovery device of claim 1, comprising:

the heat exchange device is provided with a through hole matched with the cylinder pipeline;

the cylinder pipe penetrates through the through hole and is arranged in the heat exchange device, and in the vertical direction of the cylinder pipe, the position of the blocking terminal corresponds to the position of the lower drainage outlet.

3. The water heater heat recovery device of claim 1, comprising:

the heat exchange device is provided with a heat exchange temperature sensing bulb and a water level switch;

the support structure is provided with an upper water outlet.

4. The water heater heat recovery device of claim 3, comprising:

the installation height of the water level switch is greater than that of the heat exchange device.

5. The water heater heat recovery device of claim 1, wherein the support structure further comprises: the plug terminal is arranged in the piston accommodating cavity, the size of the cavity of the piston accommodating cavity is matched with that of the plug terminal, lateral through holes are formed in the periphery of the piston accommodating cavity, and the bottom of the piston accommodating cavity is provided with the lower drainage outlet.

6. The heat recovery device of the water heater as claimed in claim 1, wherein the water storage tank comprises a first water storage tank and a second water storage tank, and the second water storage tank is disposed in the first water storage tank.

7. The water heater heat recovery device of claim 1, wherein the connection of the end of the column conduit proximate the bottom of the support structure to the blocking terminal comprises: the cylinder pipeline is close to one end of the bottom of the supporting structure is connected with the blocking terminal through a K-column structure, the blocking terminal is provided with a side through hole, and the K is an integer larger than 1.

8. A control method for heat recovery of a water heater based on the control device for heat recovery of a water heater of claims 1 to 7, comprising:

if the water storage water level is greater than or equal to the water storage water level threshold and the water storage temperature is greater than or equal to the water storage temperature threshold;

and controlling a refrigerant valve to enable the refrigerant to flow into the heat recovery device for heat recovery and then flow into the compressor of the water heater, wherein the valve is used for controlling the flow and the flow direction of the refrigerant.

9. The method as claimed in claim 8, wherein the refrigerant valve comprises a first electronic expansion valve, a second electronic expansion valve and a solenoid valve.

10. The heat recovery control method of the water heater according to claim 9,

the first electronic expansion valve is arranged on a refrigerant pipe connecting the condenser and the evaporator;

11. The method as claimed in claim 10, wherein the controlling the refrigerant valve to make the refrigerant flow into the heat recovery device for heat recovery and then flow into the compressor of the water heater comprises:

and controlling the electromagnetic valve to be closed, controlling the first electronic expansion valve to gradually increase the opening degree, and controlling the second electronic expansion valve to gradually increase the opening degree so that the refrigerant flows into the heat recovery device for heat recovery and then flows into the compressor of the water heater.

12. The method as claimed in claim 10, wherein the step of controlling the valve of the refrigerant to make the refrigerant flow into the heat recovery device for heat recovery and then flow into the compressor of the water heater further comprises:

monitoring the stored water level and the stored water temperature;

comparing the current water storage level with the water storage level N seconds ago, and comparing the water storage temperature with the water storage temperature threshold, wherein N is greater than 0;

if the current water storage level is smaller than the water storage level before the N seconds or the water storage temperature is smaller than the water storage temperature threshold value;

and controlling the electromagnetic valve to be opened, controlling the first electronic expansion valve to gradually reduce the opening degree to the initial step number, controlling the second electronic expansion valve to gradually reduce the opening degree until the second electronic expansion valve is closed, and enabling the refrigerant to directly flow into the compressor of the water heater after flowing into the evaporator.

13. The heat recovery control method of the water heater according to claim 11 or 12, wherein the controlling the electromagnetic valve to be closed or opened comprises:

14. The heat recovery control method of the water heater according to claim 8, wherein before the obtaining of the water level and the water temperature, the method further comprises:

acquiring the outdoor environment temperature;

and if the outdoor environment temperature is less than the environment temperature threshold value.