Laundry heat recovery system

Abstract

The application relates to the technical field of heat energy recycling, and particularly discloses a laundry room heat energy recycling system, which comprises a heat pump unit, a wet gas recycling device, a heat storage water tank and a steam generating device. The steam generating device is connected with washing machines and ironing machines through pipelines. The wet gas recycling device comprises a supply air pipe provided with a high-temperature heat exchanger, a return air pipe provided with a dehumidification heat exchanger, an evaporation circulation pipeline and a condensation circulation pipeline. The return air pipe is used for sending the wet hot air in a washing room or a drying room to the dehumidification heat exchanger for condensation and dehumidification. The supply air pipe is used for sending the hot air at the high-temperature heat exchanger to the drying room. The heat storage water tank is connected with the water inlet of the washing machine through a pipeline. The patent aims to solve the problems that the existing laundry room waste heat recycling system lacks comprehensive utilization of the waste heat of drainage and wet hot air, the waste heat recycling rate is low, and the dehumidification of the laundry room is insufficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat energy recycling, in particular to a laundry room heat energy recycling system. BACKGROUND

[0002] At present, the laundry room and drying room are provided in the laundry machine room of the hospital, large hotel or linen company, a plurality of washing machines and ironing machines are arranged in the laundry room. A large amount of hot water is needed when the washing machine washes clothes, and the clothes are dried by using the heat generated by the heat exchange of the high-temperature steam after washing. At the same time, a large amount of heat is also emitted in the room. The ironing machine is used to heat the bed sheet and quilt through the high-temperature steam, and the bed sheet and quilt are flattened and dried. At the same time, a large amount of heat is also emitted in the room. The heat emitted by a large amount of steam makes the temperature and humidity in the laundry room high, and the air-conditioner needs to be used for cooling all the year round. In addition, the large air exhaust fan is used to exhaust the hot air in the room to the outside. The drying room needs a large amount of steam, and the air exhaust fan needs to be used for exhausting the moisture all the year round to reduce the humidity of the drying room, so that the clothes can be dried quickly. However, a large amount of heat is lost, and the heat supply load of the drying room is increased.

[0003] The existing laundry room waste heat recycling system recovers part of the waste heat of the humid air by using the heat exchanger. The waste heat of the drainage and the humid air is not comprehensively utilized, the waste heat recycling rate is low, and the humidity of the laundry room is not dehumidified enough. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a laundry room heat energy recycling system, which solves the problems that the existing laundry room waste heat recycling system lacks comprehensive utilization of the waste heat of the drainage and the humid air, the waste heat recycling rate is low, and the humidity of the laundry room is not dehumidified enough.

[0005] In order to solve the above problems, the technical scheme adopted by the present application is as follows: a laundry room heat energy recycling system, comprising a drying room and a laundry room provided with washing machines and ironing machines; and a heat pump, a moisture recovery device, a heat storage water tank and a steam generating device. The steam generating device is connected with the washing machines and the ironing machines through pipelines. The moisture recovery device comprises a supply air pipe provided with a high-temperature heat exchanger, a return air pipe provided with a dehumidification heat exchanger, an evaporation circulation pipeline and a condensation circulation pipeline. The evaporation circulation pipeline is connected with the dehumidification heat exchanger and the evaporator of the heat pump respectively. The condensation circulation pipeline is connected with the high-temperature heat exchanger and the condenser of the heat pump respectively. The return air pipe is arranged in the drying room and the laundry room respectively. The supply air pipe is arranged in the drying room. The return air pipe is used to send the humid air in the laundry room or the drying room to the dehumidification heat exchanger for condensation and dehumidification. The supply air pipe is used to send the hot air at the high-temperature heat exchanger to the drying room. The heat storage water tank is connected with the steam generating device and the ironing machine through pipelines. The heat storage water tank is connected with the water inlet of the washing machine through a pipeline.

[0006] The technical principle generated by the scheme is that: the wet and hot waste gas generated by the ironing machine in the laundry room, the wet and hot waste gas generated by the high-temperature washing of the washing machine and the wet and hot waste gas generated by the drying of clothes in the drying room are all sent to the evaporator of the heat pump unit through the return air duct, the dehumidification heat exchanger, the evaporation circulation back to the furnace, the dehumidification heat exchanger is used to heat exchange the low-temperature circulating water on the side of the heat pump evaporator with the indoor circulating air, so that the wet and hot waste gas is condensed into water at the dehumidification heat exchanger and discharged outside, achieving the purpose of dehumidification in the drying room and the laundry room; the dehumidification heat exchanger recovers heat for the circulating water on the side of the heat pump evaporator while dehumidifying the circulating air, and transmits the heat to the evaporator of the heat pump unit, providing the required heat source for the heat pump unit; the high-temperature heat of the condenser of the heat pump is sent to the high-temperature heat exchanger at the air supply pipe through the condensation circulation pipe, and the high-temperature heat exchanger is used to heat exchange the circulating hot water on the side of the condenser of the heat pump unit with the dehumidified circulating air, so that the temperature of the drying room is increased, and the requirement of drying cloth is achieved; the circulating air passing through the dehumidification heat exchanger is sent to the drying room through the air supply pipe to improve the temperature of the drying room.

[0007] The beneficial effects generated by the scheme are: 1. By replacing the original steam heating drying with heat pump heating air drying, the phenomenon of high temperature and high humidity in the drying room caused by steam drying and the energy waste of a large amount of high-humidity and high-temperature air discharged outside is reduced; secondly, the low-temperature circulating medium of the evaporator is continuously sent to the dehumidification heat exchanger in the drying room and the laundry room through the circulation pipe, the dehumidification heat exchanger exchanges heat with the indoor air to condense the moisture in the air into water, which is then discharged outside to achieve the purpose of dehumidification, and the dehumidification heat exchanger recovers heat from the indoor air during the dehumidification process, and then sends the heat back to the evaporator through the circulation pipe, sends the high-pressure and high-temperature medium to the condenser through the compressor, and sends the high-temperature medium of the condenser to the drying room heating heat exchanger through the cooling circulation pipe to heat and heat the drying room; the system can reduce the air humidity in the drying room to 20% through the dehumidification, and the heating section can raise the indoor temperature to above 50℃, and can achieve rapid drying of cloth and clothes in a closed state of the drying room, and the heat is discharged outside, thereby improving the drying efficiency of the drying room and reducing energy consumption;

[0008] 2. By collecting the condensate water and heat energy discharged from each device, the water is directly used for washing machine water supply, which saves water and improves hot water supply temperature, reduces steam consumption of the washing machine; and the collected condensate water is softened water, thereby reducing the amount of softened water and saving the operation cost of the equipment;

[0009] 3. The scheme recovers heat in the working environment and uses the comprehensive application technology of dehumidification and heat recovery, which can reduce the heat consumption of the drying room by 50%, save steam consumption, save natural gas expenses, and provide a more comfortable working environment and higher working efficiency.

[0010] With the actual hospital laundry machine group technical transformation project as an example, the scheme is adopted to save the heat consumption of the drying room, save the steam consumption 3t / d, save the natural gas 220m 3 / d; the condensate water discharged by the ironing machine, steam / hot water heat exchanger and other drainages is 12t per day, the recovered water temperature is 80℃, and the recovered heat is (80℃-20℃)*1.163*12m 3 / d; the recovered heat is 837kw, and the natural gas is saved by 87m 3 / d; the water is saved by 12t / d.

[0011] Further, the heat exchanger includes a heat dissipation pipeline and a heat absorption pipeline, the waste water discharged by the laundry machine is connected to the heat dissipation pipeline, and the heat absorption pipeline is connected to cold water and connected to the heat recovery water storage tank.

[0012] The heat exchanger is heat exchanged with tap water, and the heated softened water is stored in the heat storage tank to provide hot water for the laundry machine, and the recovered washing sewage is discharged to the original drainage facility after the temperature is reduced. Further, energy is saved, and the heat utilization rate is improved.

[0013] Further, the heat storage tank includes a clean heat preservation tank and a waste heat recovery tank, the clean heat preservation tank is connected to the drain port of the ironing machine through a pipeline, the waste heat recovery tank is connected to the water inlet of the laundry machine through a pipeline, and the clean heat preservation tank and the waste heat recovery tank are connected through a pipeline.

[0014] The clean heat preservation tank and the waste heat recovery tank are set to distinguish the collected high-temperature softened water and the tap water heated by the heat exchanger, so that the softened water in the softened water tank can be taken as needed, and the softened water is used for laundry. It is not easy to produce dregs with soap powder, the soft water laundry foam is rich, the wear of the clothes is reduced, the clothes is soft after washing, and the color lasts longer.

[0015] Further, the waste heat recovery tank is provided with a water level sensor, the clean heat preservation tank is provided with a water pump for pumping hot water from the clean heat preservation tank to the waste heat recovery tank, the output end of the water level sensor is electrically connected with a controller, the output end of the controller is electrically connected with the input end of the water pump, and the controller controls the start and stop of the water pump according to the water level sensor signal.

[0016] The water level sensor, the controller and the water pump are used for automatic water replenishment of the waste heat recovery tank, so as to ensure sufficient water for the laundry machine.

[0017] Further, the heat exchanger includes a first heat exchanger and a second heat exchanger arranged in sequence along the waste water discharge direction, the heat absorption pipeline of the first heat exchanger is communicated with the heat absorption pipeline of the second heat exchanger, and the heat dissipation pipeline of the first heat exchanger and the heat dissipation pipeline of the second heat exchanger are communicated.

[0018] When the waste water passes through the first heat exchanger and the second heat exchanger, the temperature of the waste water is gradually reduced, and the cold water is preheated by passing through the second heat exchanger first, and then is heated again by passing through the first heat exchanger; the waste water discharged is used for step-by-step utilization of the waste heat, and finally the temperature of the waste water discharged can be reduced to 20 DEG C, the waste heat is fully utilized, and the heat dissipation efficiency of the heat exchanger is improved.

[0019] Further, the return air duct and the supply air duct are arranged perpendicularly to each other in the drying chamber. By arranging the return air duct and the supply air duct perpendicularly to each other, the air outlet end of the supply air duct is away from the air inlet end of the return air duct, so that the hot air flows along a 90-degree arc to the return air duct in the drying chamber, and the hot and humid air in the drying chamber is brought out; the air inlet end of the supply air duct is close to the air outlet end of the return air duct, so that the evaporation circulation pipeline and the condensation circulation pipeline can be arranged along the same path outside.

[0020] Further, the evaporation circulation pipeline comprises an evaporation outlet water pipe and an evaporation return water pipe; the condensation circulation pipeline comprises a condensation outlet water pipe and a condensation return water pipe; the evaporation outlet water pipe is provided with a temperature sensor; the evaporation return water pipe comprises a drying branch pipe and a laundry branch pipe, the drying branch pipe is communicated with the return air duct arranged in the drying chamber, and the laundry branch pipe is communicated with the return air duct arranged in the laundry chamber; the laundry branch pipe is provided with an electric regulating valve; and the temperature sensor and the electric regulating valve are electrically connected with a first controller respectively; the temperature sensor is used for detecting the temperature of the evaporation outlet water and transmitting a temperature signal to the controller; and the controller is used for controlling the opening degree of the electric regulating valve according to the temperature signal.

[0021] When the temperature sensor detects that the evaporation outlet water temperature is lower than a set value, the controller controls the electric regulating valve to increase the opening degree; and when the temperature sensor detects that the evaporation outlet water temperature is greater than the set value, the controller controls the electric regulating valve to decrease the opening degree.

[0022] The condenser of the heat pump provides high-temperature heat for the drying chamber, and the heat is sent to the drying chamber through the supply air duct; the evaporator of the heat pump provides cold energy for the drying room and the laundry room for dehumidification; when the evaporation outlet water temperature is lower than a set value, it indicates that the heat required by the drying room is greater than the heat collected by the drying chamber for dehumidification at this time, and the controller increases the opening degree of the electric regulating valve at this time, so as to increase the heat collected by the laundry branch pipe for dehumidification of the laundry room, to meet the gap of the low-temperature heat source required by the evaporator during the operation of the heat pump, and to make up the amount of heat dissipated by the washing machine and the ironing machine, so that the heat provided by the heat pump unit and the heat provided by the evaporator are balanced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of embodiment 1 of the present application.

[0024] Figure 2 It is a schematic diagram of embodiment 2 of the present application. DETAILED DESCRIPTION

[0025] The specific embodiments are further described in detail below:

[0026] The reference signs in the attached drawings of the specification include: heat pump 1, steam outlet pipe 11, evaporation return water pipe 110, return air pipe 12, drying and dehumidifying heat exchanger 121, condensation outlet pipe 13, condensation return water pipe 131, air supply pipe 14, air supply fan 141, high-temperature heat exchanger 142, drying chamber 2, laundry room 3, laundry dehumidifying heat exchanger 31, washing machine 4, drainage heat recovery water tank 41, first heat exchanger 42, second heat exchanger 43, heat storage water tank 5, clean heat preservation water tank 51, waste heat recovery water tank 52, water level sensor 511, water pump 512, second controller 513, steam generating device 6, ironing machine 7, first controller 8, temperature sensor 81, electric regulating valve 82.

[0027] Embodiment 1 as shown in the attached Figure 1 The laundry room heat energy recovery system includes a drying chamber and a laundry room provided with a washing machine and an ironing machine, and further includes a heat pump 1, a moisture recovery device, a heat storage water tank 5, a steam generating device 6, and a washing machine 4 heat recovery device. The steam generating device 6 is connected to the washing machine 4 and the ironing machine 7 through pipes respectively. The moisture recovery device includes an air supply pipe 14 provided with a high-temperature heat exchanger 142 and an air supply fan, a return air pipe 12 provided with a dehumidifying heat exchanger, and an evaporation circulation pipeline and a condensation circulation pipeline. The evaporation circulation pipeline is connected to the dehumidifying heat exchanger and the evaporator of the heat pump 1 respectively. The condensation circulation pipeline is connected to the high-temperature heat exchanger 142 and the condenser of the heat pump 1 respectively. The return air pipe 12 is arranged in the laundry room 3 and the drying chamber 2 respectively, and the air supply pipe 14 is arranged in the drying chamber 2. The evaporation circulation pipeline is used to transport the cold energy provided by the evaporator to the dehumidifying heat exchanger through the circulating medium. The condensation circulation pipeline is used to transport the heat provided by the condenser to the high-temperature heat exchanger 142 through the circulating medium. The return air pipe 12 is used to send the hot and humid air in the laundry room 3 and the drying chamber 2 to the dehumidifying heat exchanger for condensation and dehumidification. The air supply pipe is used to send the hot air at the high-temperature heat exchanger to the drying chamber. The heat storage water tank 5 is connected to the steam outlet of the ironing machine 7 and the steam generating device 6 through pipes respectively. The heat storage water tank 5 is connected to the water inlet of the washing machine 4 through a pipe.

[0028] The dehumidifying heat exchanger includes a laundry dehumidifying heat exchanger and a drying dehumidifying heat exchanger. The laundry dehumidifying heat exchanger is arranged in the return air pipe in the laundry room. The drying dehumidifying heat exchanger is arranged in the return air pipe in the drying chamber. An exhaust fan 121 is arranged in the return air pipe 12 to collect the hot and humid exhaust gas in the laundry room 3 or the drying chamber 2. An air supply fan 141 is arranged in the air supply pipe 14.

[0029] The evaporation circulation pipeline comprises an evaporating water outlet pipe 11 and an evaporating water return pipe 110; the condensation circulation pipeline comprises a condensing water outlet pipe 13 and a condensing water return pipe 131; the evaporating water outlet pipe 11 is provided with a temperature sensor 81; the evaporating water return pipe 110 comprises a drying branch pipe and a washing branch pipe, which are respectively communicated with a drying dehumidification heat exchanger 121 and a washing dehumidification heat exchanger 31; the washing branch pipe is provided with an electric regulating valve 82; the first controller 8 is electrically connected with the temperature sensor 81 and the electric regulating valve 82 respectively; the temperature sensor 81 is used for detecting the evaporator outlet water temperature and transmitting a temperature signal to the controller; the controller is used for controlling the opening degree of the electric regulating valve 82 according to the temperature signal.

[0030] When the temperature sensor 81 detects that the evaporator outlet water temperature is lower than the set value, the controller controls the electric regulating valve 82 to open; when the temperature sensor 81 detects that the evaporator outlet water temperature is greater than or equal to the set value, the controller controls the electric regulating valve 82 to close.

[0031] The laundry machine heat recovery device comprises a drainage heat recovery water tank 41 and a heat exchanger, the heat exchanger comprises a heat dissipation medium pipeline and a heat absorption medium pipeline; the water inlet pipe of the drainage heat recovery water tank 41 is communicated with the water outlet pipe of the laundry machine 4, the water outlet pipe of the drainage heat recovery water tank 41 is communicated with the heat dissipation pipeline of the heat exchanger, the waste water discharged from the laundry machine 4 is introduced into the heat dissipation pipeline, the heat absorption pipeline is introduced into tap water, and the water outlet of the heat absorption pipeline is connected with the heat storage water tank 5; the heat storage water tank 5 is connected with the second cold water inlet of the laundry machine 4 through a pipeline. The heat exchanger comprises a first heat exchanger 42 and a second heat exchanger 43. The first heat exchanger 42 and the second heat exchanger 43 are arranged in sequence along the waste water discharge direction, the heat absorption pipeline of the first heat exchanger 42 is communicated with the heat dissipation pipeline of the second heat exchanger 43, and the heat dissipation pipeline of the first heat exchanger 42 is communicated with the heat dissipation pipeline of the second heat exchanger 43.

[0032] The wet and hot waste gas generated by the ironing machine 7 in the laundry room 3, the wet and hot waste gas generated by the high-temperature washing of the laundry machine 4 and the wet and hot waste gas generated by the drying of clothes in the drying room 2 are all introduced into the return air pipeline, and the evaporator absorbs heat to condense the wet and hot waste gas into water; the drying heat supply mode of the drying room adopts the heat pump 1 heat supply mode, the condenser of the heat pump 1 provides high-temperature heat for the drying room 2, which is sent to the drying room 2 through the air supply pipeline; the evaporator of the heat pump provides cold energy for dehumidification of the drying room and the laundry room; when the outlet water temperature of the evaporator is lower than the set value, it indicates that the heat required by the drying room is greater than the heat collected by the drying room 2 for dehumidification at this time, and the controller opens the electric regulating valve to recover the heat for dehumidification of the laundry room at this time, so that the low-temperature heat source gap required by the heat pump 1 to run the evaporator in the present scheme comes from the high-heat and high-humidity working environment of the laundry machine 4 and the ironing machine 7. The heat storage water tank 5 stores the 80℃ high-temperature softened water discharged from the ironing machine 7 and the steam generating device 6, and then the high-temperature softened water is reused for washing in the laundry machine 4, which can reduce the consumption of high-temperature steam for washing.

[0033] The waste water discharged from the washing machine 4 is collected in the drain heat recovery water tank 41, and the waste water is pumped into the heat exchanger 3 by the water pump 512. When the waste water passes through the first heat exchanger 42 and the second heat exchanger 43, the temperature of the waste water is gradually reduced. The cold water is preheated and warmed up by the second heat exchanger 43 first, and then warmed up again by the first heat exchanger 42. The waste heat of the discharged waste water is utilized by the first heat exchanger 42 and the second heat exchanger 43 in stages, and finally the waste water is discharged at a temperature of 20℃, realizing the full utilization of waste heat and improving the heat dissipation efficiency of the heat exchanger. The waste water is heated and warmed up in the heat exchanger, and then stored in the heat storage water tank 5. The temperature of the water after being warmed up twice can reach 50-60℃. The hot water in the heat storage water tank 5 is introduced into the washing machine 4 again, improving the water temperature of the washing machine 4, thereby saving the amount of steam used and saving energy.

[0034] Taking the actual hospital washing machine room technical transformation project of the unit as an example, the scheme saves 1t / d of steam consumption and 110m 3 / d of natural gas; the ironing machine 7, the steam generating device 6 and other drain devices discharge condensate water, 5.2t per day, with a recovery water temperature of 80℃, a recovery heat quantity of (80℃-20℃)*1.163*5.2m 3 , and a total recovery heat quantity of 363kw, saving 55m 3 / d of natural gas; and saving 6.2t / d of water.

[0035] The discharge capacity of a single washing machine 4 is 0.3-0.5m 3 / minute, and each washing machine 4 is cleaned 25-40 times per day. Taking the average value for calculation, 0.4m 3 / minute*30 times / d, the daily hot water recovery quantity is 12m 3 , the average hot water recovery temperature is 60℃, the recovery heat quantity is (60℃-20℃)*1.163*12m 3 , the total recovery heat quantity is 558kw, and 85m 3 / d of natural gas is saved.

[0036] As can be seen from the above data, the laundry room heat energy recovery system using the scheme has remarkable energy saving effect. Through the operation of the device, the humid hot air in the drying chamber is condensed in the drying and dehumidifying heat exchanger, thereby removing the moisture in the air. The dehumidified air is heated by the high-temperature heat exchanger in the air supply pipe under the action of the air supply fan, and then enters the drying chamber again through the air supply pipe, thereby reducing the humidity in the drying chamber to below 30%. The dehumidification reduces the humidity in the drying chamber, thereby improving the drying efficiency of the drying chamber.

[0037] The same part of embodiment 2 as embodiment 1 is not repeated, and the difference is that the return air pipe 12 and the supply air pipe 14 are arranged vertically in the drying chamber 2, the air outlet end of the supply air pipe 14 is away from the air inlet end of the return air pipe 12, and the air inlet end of the supply air pipe 14 is close to the air outlet end of the return air pipe 12.

[0038] By arranging the return air pipe and the supply air pipe vertically, the air outlet end of the supply air pipe is away from the air inlet end of the return air pipe, so that the hot air discharged by the hot air supply pipe 14 flows along a 90-degree arc to the return air pipe in the drying room, and the hot air heats and evaporates the clothes to be dried in the drying chamber 2 to form humid hot air, and then takes out the humid hot air in the drying chamber 2; the air inlet end of the supply air pipe 14 is close to the air outlet end of the return air pipe 12, so that the evaporation circulation pipeline and the condensation circulation pipeline can be arranged along the same path outside, thereby facilitating the arrangement of the external pipeline.

[0039] The heat storage water tank 5 includes a clean heat preservation water tank 51 and a waste heat recovery water tank 52, the clean heat preservation water tank 51 is connected with the steam outlet of the iron 7 through a pipeline, the waste heat recovery water tank 52 is connected with the water inlet of the washing machine 4 through a pipeline, and the clean heat preservation water tank 51 and the waste heat recovery water tank 52 are connected through a pipeline. The waste heat recovery water tank 52 is provided with a water level sensor 511, the clean heat preservation water tank 51 is provided with a water pump 512 for pumping hot water from the clean heat preservation water tank 51 into the waste heat recovery water tank 52, the output end of the water level sensor 511 is electrically connected with a second controller 513, and the output end of the second controller 513 is electrically connected with the input end of the water pump 512. The second controller 513 controls the start and stop of the water pump 512 according to the signal of the water level sensor 511.

[0040] When the water level signal sent by the water level sensor 511 to the second controller 513 is lower than the preset value, the second controller 513 outputs a control signal to control the water pump 512 to start, and then the soft water in the clean heat preservation water tank 51 is pumped into the waste heat recovery water tank 52, so that the waste heat recovery water tank 52 provides hot water for the washing water of the washing machine 4. The waste heat recovery water tank 52 is automatically replenished, so as to ensure sufficient washing water for the washing machine 4.

[0041] By arranging the clean heat preservation water tank 51 and the waste heat recovery water tank 52, the collected high-temperature softened water and the tap water heated by the heat exchanger are distinguished, so that the softened water in the softened water tank can be taken according to the need, and the softened water is used for washing to enrich the foam, reduce the wear of the clothes, make the clothes soft after washing, and keep the color longer.

[0042] The above-mentioned are only embodiments of the present application, and the common knowledge of specific structures and characteristics in the scheme is not described too much. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the patent. The protection scope claimed in this application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A laundry room heat recovery system, comprising a drying room and a laundry room equipped with a washing machine and an ironing machine; characterized in that: The system includes a heat pump, a moisture recovery device, a hot water storage tank, and a steam generator. The steam generator is connected to the washing machine and the ironing machine via pipes. The moisture recovery device includes an air supply duct with a high-temperature heat exchanger, a return air duct with a dehumidifying heat exchanger, an evaporation circulation pipe, and a condensation circulation pipe. The evaporation circulation pipe is connected to the dehumidifying heat exchanger and the evaporator of the heat pump, respectively. The condensation circulation pipe is connected to the high-temperature heat exchanger and the condenser of the heat pump, respectively. The return air duct is located in the drying chamber and the washing machine chamber, respectively. The air supply duct is located in the drying chamber. The return air duct is used to send the humid and hot air from the washing machine or drying chamber to the dehumidifying heat exchanger for condensation and dehumidification. The air supply duct is used to send the hot air from the high-temperature heat exchanger to the drying chamber. The hot water storage tank is connected to the drain outlets of the ironing machine and the steam generator via pipes, and the hot water storage tank is connected to the water inlet of the washing machine via pipes. The laundry room heat recovery system also includes a heat exchanger, which includes a heat dissipation pipe and a heat absorption pipe. Wastewater discharged from the washing machine is fed into the heat dissipation pipe, and cold water is fed into the heat absorption pipe and connected to a hot water storage tank. The heat exchangers are arranged in sequence along the wastewater discharge direction, with the heat absorption pipe of the first heat exchanger connected to the heat absorption pipe of the second heat exchanger, and the heat dissipation pipe of the first heat exchanger connected to the heat dissipation pipe of the second heat exchanger. The return air duct and the supply air duct are arranged perpendicularly to each other in the drying chamber.

2. The laundry room heat recovery system according to claim 1, characterized in that: The hot water storage tank includes a cleaning and heat preservation water tank and a waste heat recovery water tank. The cleaning and heat preservation water tank is connected to the drain outlet of the ironing machine through a pipe, and the waste heat recovery water tank is connected to the water inlet of the washing machine through a pipe. The cleaning and heat preservation water tank and the waste heat recovery water tank are connected by a pipe.

3. The laundry room heat recovery system according to claim 2, characterized in that: The waste heat recovery water tank is equipped with a water level sensor, and the clean and insulated water tank is equipped with a water pump that draws hot water from the clean and insulated water tank into the waste heat recovery water tank. The output terminal of the water level sensor is electrically connected to a second controller, and the output terminal of the second controller is electrically connected to the input terminal of the water pump. The second controller controls the start and stop of the water pump according to the water level sensor signal.

4. The laundry room heat recovery system according to claim 1, characterized in that: The evaporation circulation pipeline includes an evaporation outlet pipe and an evaporation return pipe; the condensation circulation pipeline includes a condensation outlet pipe and a condensation return pipe. The evaporation outlet pipe is equipped with a temperature sensor. The evaporation return pipe includes a drying branch pipe and a washing branch pipe. The drying branch pipe is connected to the return air duct installed in the drying chamber, and the washing branch pipe is connected to the return air duct installed in the washing chamber. The washing branch pipe is equipped with an electric regulating valve. The system also includes a first controller that is electrically connected to the temperature sensor and the electric regulating valve respectively. The temperature sensor is used to detect the temperature of the evaporation outlet water and transmit the temperature signal to the controller. The controller is used to control the opening degree of the electric regulating valve according to the temperature signal to ensure the stable operation of the heat pump unit.

Images