A dual-temperature hot water heat recovery unit

Abstract

The present invention provides a dual-temperature hot water heat recovery unit, which relates to the technical field of recovery units and includes a compressor, wherein the compressor outlet is connected to a flow distribution regulating valve via a pipeline, the flow distribution regulating valve is provided with two outlets and is connected to a recovery component for preparing dual-temperature hot water, the recovery component includes a first condenser and a second condenser, the first condenser is connected to a liquid reservoir inlet via a pipeline, the liquid reservoir outlet is connected to a first expansion valve inlet via a pipeline, the first expansion valve outlet is connected to an adjacent pipeline of the second condenser, and the second condenser is connected to an evaporator inlet via a pipeline and a second expansion valve. This design prepares a certain amount of higher-temperature hot water to meet customer needs while meeting the conventional hot water demand on the user side, achieving the purpose of one machine serving two purposes. Compared with existing equipment, this application can achieve dual-temperature hot water treatment without the need for other equipment to assist in increasing or decreasing the temperature, and is more efficient in terms of operating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of recovery units, and in particular to a dual-temperature hot water heat recovery unit. Background Art

[0002] A heat recovery unit is a device that recovers and reuses waste heat energy, such as an embedded heat recovery unit with patent publication number CN112944647B. The heat recovery unit includes a compressor, a condenser, a throttle valve and an evaporator that are connected in a cycle. The condenser includes a shell, a condenser pipe and a heat recovery pipe are arranged in the shell, and the heat recovery pipe is layered above the condenser pipe. One end of the shell is provided with a heat recovery inlet pipe and a heat recovery outlet pipe connected to the heat recovery pipe, and a condensation inlet pipe and a condensation outlet pipe connected to the condenser pipe. The heat recovery pipe is connected to a hot water tank through the heat recovery inlet pipe and the heat recovery inlet pipe to form a heat recovery circulation system. The condenser is connected to a cooling tower through the condensation inlet pipe and the condensation outlet pipe to form a condensation circulation system.

[0003] Although the above-mentioned heat recovery unit can realize the recovery operation, during the use of hot water, water sources of different temperatures will be used due to different needs. However, the hot water temperature of the above-mentioned heat recovery unit is within a fixed range after heat recovery and cannot be freely switched to the hot water temperature. For example, when the hot water temperature range is around 85 degrees, additional cooling operation is required when using lower hot water. For example, when the hot water temperature range is around 45 degrees, additional equipment is required for secondary heating operation, which results in the above-mentioned heat recovery unit being unable to directly meet different usage needs. For this reason, the present application designs a dual-temperature hot water heat recovery unit. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a dual-temperature hot water heat recovery unit, which solves the problem that the temperature of the hot water recovered by the existing recovery unit cannot directly meet the demand for hot water at different temperatures.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A dual-temperature hot water heat recovery unit includes a compressor, wherein the compressor outlet is connected to a flow distribution regulating valve via a pipeline, the flow distribution regulating valve is provided with two outlets and is connected to a recovery component for preparing dual-temperature hot water, the recovery component includes a first condenser and a second condenser, the first condenser is connected to a liquid reservoir inlet via a pipeline, the liquid reservoir outlet is connected to a first expansion valve inlet via a pipeline, the first expansion valve outlet is connected to a pipeline at one end of the second condenser, the other end of the second condenser is connected to an evaporator inlet via a pipeline and the second expansion valve, and the evaporator outlet is connected to the compressor inlet via a pipeline.

[0007] Preferably, the first condenser and the second condenser each comprise a shell, one end of the shell being provided with a hot water inlet pipe and a refrigerant inlet pipe, and the other end of the shell being provided with a hot water outlet pipe and a refrigerant outlet pipe;

[0008] Each of the hot water outlet pipes is connected to an adjacent water tank, each of the hot water inlet pipes is connected to an external water pipe, the refrigerant outlet pipe located in the first condenser is connected to the liquid reservoir, the liquid reservoir and the first expansion valve are connected to the refrigerant inlet pipe through a pipeline, and the refrigerant outlet pipe located in the second condenser is connected to the second expansion valve and the evaporator.

[0009] Preferably, an extension cover is provided on the outside of the shell, the hot water outlet pipe is installed on the outside of the extension cover, and the outside of the hot water outlet pipe is connected to the water tank through a flow sensor;

[0010] A fitting cylinder is provided inside the shell, and the fitting cylinder is sealed and fitted with the inner wall of the shell. A spiral protrusion is provided inside the fitting cylinder, and a conveying groove is provided inside the spiral protrusion. The outer side of the spiral protrusion is provided with an opening and a sealing gasket is provided at the opening. The opening of the spiral protrusion is communicated with the extension cover. A fixed cannula is provided at one end of the spiral protrusion, and a movable cannula is movably provided inside the fixed cannula.

[0011] Preferably, a fixed disk is installed on the inner wall of the shell, a rotating disk is rotatably installed on the outside of the fixed disk, a groove is provided in the center of the rotating disk, a support seat is provided in the center of the fixed disk, a rotating seat is rotatably installed inside the support seat, a transmission wheel is installed on the outside of the rotating seat, a plurality of force-bearing grooves are provided on the inner wall of the groove, and the transmission wheel is docked with the plurality of force-bearing grooves.

[0012] Preferably, the center of the rotating disk is rotatably connected to a rotating main shaft through a bearing, the rotating main shaft is provided with a plurality of auxiliary blades for the flow of refrigerant, a bearing seat is installed inside the refrigerant outlet pipe, and a transmission screw is rotatably installed inside the bearing seat.

[0013] Preferably, a serial rotating groove is provided inside the rotating main shaft, a serial shaft is provided inside the serial rotating groove, a limiting groove is provided in the middle of the serial rotating groove, a limiting plate is provided on the serial shaft body, and the limiting plate is located inside the limiting groove.

[0014] Preferably, docking slots are provided inside the transmission screw and the rotating seat, docking seats are installed at both ends of the series shaft, and offset holes are provided at both ends of the rotating main shaft, and the docking seats are limitedly matched with adjacent docking slots.

[0015] Preferably, a screw sleeve frame is fixedly mounted on one end of the fitting cylinder, and the transmission screw rod body is threadedly matched with the screw sleeve frame.

[0016] Preferably, an adjusting cylinder is fixedly installed on one side of the interior of the shell, the flow sensor is connected to the adjusting cylinder and the hydraulic rod signal, a movable frame is fixedly installed on the output end of the adjusting cylinder, a driving motor is fixedly installed inside the movable frame, a connecting shaft is provided at the output end of the driving motor, and the output end of the connecting shaft passes through the rotating seat and is fixedly connected to the series shaft.

[0017] Preferably, a docking hole is provided inside the fixed disk, and the lower end of the hot water inlet pipe is connected to the docking hole. An infusion groove is provided inside the rotating disk, and the infusion groove is connected to the movable cannula. The docking hole and the infusion groove are connected in series.

[0018] A plurality of expansion holes are provided on the outside of the fixed plate, a hydraulic rod is fixedly installed inside each expansion hole, a friction disk is fixedly installed on the output end of the hydraulic rod, and the friction disk is located inside the infusion tank and frictionally cooperates with the inner wall of the infusion tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The second condenser is the main condenser, and the hot water temperature on the user side is the priority condition. The unit adjusts the second expansion valve while loading the compressor load to meet the temperature and flow requirements of the hot water on the user side. Then, it continues to load the compressor and opens the flow distribution regulating valve to allow part of the refrigerant to flow into the first condenser. The flow distribution regulating valve and the first expansion valve cooperate to adjust so that the hot water on the user side reaches the required temperature. The liquid storage device is used to adjust the amount of refrigerant circulating in the system. Under the premise of meeting the conventional hot water demand on the user side, this design prepares a certain amount of higher temperature hot water to meet customer needs, achieving the purpose of one machine with two uses. Compared with existing equipment, this application can achieve dual-temperature hot water treatment without the need for other equipment to assist in increasing and decreasing the temperature, and is more efficient in operation.

[0021] 2. In this application, the flow sensor can detect the current hot water outlet pipe drainage situation in real time. When the water flow changes significantly, such as an increase or decrease in flow, a signal will be transmitted to the regulating cylinder and the hydraulic rod, and the regulating cylinder will be extended and retracted at the output end accordingly, thereby adjusting the contact area between the subsequent water flow and the refrigerant, so that corresponding heat recovery processing can be performed according to the water flow size, avoiding the situation where the water temperature is insufficient due to a large water flow, or the water temperature is too high due to a small water flow under a fixed contact area.

[0022] 3. In the present application, the sealing fit between the fitting tube and the inner wall of the shell can ensure that when the water flows into the interior of the spiral protrusion, it can be transported separately from the refrigerant entering the interior of the shell. In the process of transportation, the distance between the spiral protrusion and the extension cover can be adjusted to adjust the contact area between the spiral protrusion and the refrigerant, thereby ensuring that the water temperature will not deviate. The use of fixed and movable insert tubes can enable the fitting tube to carry out normal water flow transportation even when the position changes.

[0023] 4. When the exchange area needs to be adjusted, the tandem shaft is moved to one side of the transmission screw, and then the docking card seat is inserted into the docking card slot inside the transmission screw. Then, the tandem shaft is driven by the drive motor to rotate, wherein the docking card seat can make the transmission screw rotate, wherein the hydraulic rod will push out the friction disk to lock the fitting cylinder and prevent it from rotating, so that the position of the fitting cylinder can be moved under the threaded cooperation of the transmission screw and the nut frame, thereby adjusting the distance between the spiral protrusion and the extension cover, and also adjusting the contact area between the water flow and the refrigerant;

[0024] During normal heat recovery, the series shaft moves to the other side and docks the docking slot inside the rotating seat with the docking seat, and the series shaft is driven by the driving motor to rotate so that the rotating seat drives the fitting cylinder to rotate, which can improve the heat recovery efficiency.

[0025] 5. The position of the mobile frame can be adjusted through the flow sensor, and then the position of the drive motor can be adjusted accordingly. Therefore, the position of the series shaft can be adjusted through the connecting shaft during the movement, thereby realizing the switching of different functions, realizing the rotation of the fitting cylinder to improve the heat recovery efficiency or moving and adjusting the area during heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure from another perspective of the present invention;

[0028] Figure 3 It is a schematic diagram of the top structure of the present invention;

[0029] Figure 4 It is a side structural schematic diagram of the present invention;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the condenser;

[0031] Figure 6 This is a three-dimensional structural diagram of the condenser from another perspective;

[0032] Figure 7 It is a schematic diagram of the top view of the condenser;

[0033] Figure 8 yes Figure 7 Schematic diagram of the cross-section structure at AA;

[0034] Figure 9 yes Figure 7 Schematic diagram of the cross-sectional structure at the middle BB;

[0035] Figure 10 The condenser is a schematic diagram of the structure viewed from the front;

[0036] Figure 11 yes Figure 10 Schematic diagram of the cross-section structure at CC;

[0037] Figure 12 yes Figure 11 The enlarged structural diagram at a in the middle;

[0038] Figure 13 yes Figure 11 The enlarged structural diagram at point b in the middle;

[0039] Figure 14 yes Figure 10 Schematic diagram of the cross-section structure at DD in the middle;

[0040] Figure 15 It is a side view structural diagram of the condenser;

[0041] Figure 16 yes Figure 15 Schematic diagram of the cross-section structure at EE;

[0042] Figure 17 yes Figure 16 The schematic diagram of the structure is enlarged at c;

[0043] Figure 18 It is a schematic diagram of the unit system of this application.

[0044] In the figure: 1. compressor; 2. flow distribution regulating valve; 3. recovery component; 301. first condenser; 302. second condenser; 303. shell; 3031. hot water inlet pipe; 3032. refrigerant inlet pipe; 3033. hot water outlet pipe; 3034. refrigerant outlet pipe; 304. extension cover; 305. bearing seat; 306. fixed plate; 3061. rotating plate; 3062. groove; 3063. force-bearing slot; 3064. support seat; 3065. rotating seat; 3066. transmission wheel; 3067. expansion hole; 3068. hydraulic rod; 3069. friction plate; 30610. infusion tank; 30611. docking hole; 307. Rotating main shaft; 3071, auxiliary blade; 3072, serial rotating groove; 3073, limit groove; 3074, limit plate; 3075, serial shaft; 3076, offset hole; 3077, docking card seat; 3078, transmission screw; 308, fitting cylinder; 3081, spiral protrusion; 3082, sealing gasket; 3083, screw sleeve rack; 3084, fixed insert; 3085, movable insert; 309, movable rack; 3091, driving motor; 3092, regulating cylinder; 3093, connecting shaft; 310, docking card slot; 4, liquid reservoir; 5, first expansion valve; 6, second expansion valve; 7, evaporator; 8, water tank; 9, flow sensor. DETAILED DESCRIPTION

[0045] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] like Figures 1 to 18 As shown, a dual-temperature hot water heat recovery unit includes a compressor 1, the outlet of the compressor 1 is connected to a flow distribution regulating valve 2 through a pipeline, the flow distribution regulating valve 2 is provided with two outlets and is connected to a recovery component 3 for preparing dual-temperature hot water, the recovery component 3 includes a first condenser 301 and a second condenser 302, the first condenser 301 is connected to the inlet of the liquid reservoir 4 through a pipeline, the outlet of the liquid reservoir 4 is connected to the inlet of the first expansion valve 5 through a pipeline, the outlet of the first expansion valve 5 is connected to one end of the second condenser 302 through a pipeline, the other end of the second condenser 302 is connected to the inlet of the evaporator 7 through a pipeline and the second expansion valve 6, and the outlet of the evaporator 7 is connected to the inlet of the compressor 1 through a pipeline.

[0047] In this embodiment, the first condenser 301 and the second condenser 302 each include a shell 303 , one end of the shell 303 is provided with a hot water inlet pipe 3031 and a refrigerant inlet pipe 3032 , and the other end of the shell 303 is provided with a hot water outlet pipe 3033 and a refrigerant outlet pipe 3034 ;

[0048] Each hot water outlet pipe 3033 is connected to the adjacent water tank 8, and each hot water inlet pipe 3031 is connected to the external water pipe. The refrigerant outlet pipe 3034 located in the first condenser 301 is connected to the liquid reservoir 4. The liquid reservoir 4 and the first expansion valve 5 are connected to the refrigerant inlet pipe 3032 through a pipeline. The refrigerant outlet pipe 3034 located in the second condenser 302 is connected to the second expansion valve 6 and the evaporator 7.

[0049] It should be noted that an extension cover 304 is provided on the outside of the shell 303, and the hot water outlet pipe 3033 is installed on the outside of the extension cover 304. The outside of the hot water outlet pipe 3033 is connected to the water tank 8 through a flow sensor 9; in this application, the flow sensor 9 can detect the current drainage situation of the hot water outlet pipe 3033 in real time. When the water flow changes significantly, such as the flow increases or decreases, the regulating cylinder 3092 and the hydraulic rod 3068 will be transmitted with a signal, and the regulating cylinder 3092 will be extended and retracted at the output end accordingly, thereby adjusting the contact area between the subsequent water flow and the refrigerant, so that corresponding heat recovery processing can be performed according to the size of the water flow, avoiding the situation where the water temperature is insufficient due to the large water flow, or the water temperature is too high due to the small water flow under a fixed contact area.

[0050] A fitting cylinder 308 is provided inside the shell 303, and the fitting cylinder 308 is sealed and fitted with the inner wall of the shell 303. A spiral protrusion 3081 is provided inside the fitting cylinder 308, and a conveying groove is provided inside the spiral protrusion 3081. The outer side of the spiral protrusion 3081 is set as an opening and a sealing gasket 3082 is provided at the opening. The opening of the spiral protrusion 3081 is communicated with the extension cover 304. A fixed cannula 3084 is provided at one end of the spiral protrusion 3081, and a movable cannula 3085 is movably provided inside the fixed cannula 3084.

[0051] In the present application, the sealing fit between the fitting tube 308 and the inner wall of the shell 303 can ensure that when the water flows into the spiral protrusion 3081, it can be transported separately from the refrigerant entering the shell 303. In the process of transportation, the distance between the spiral protrusion 3081 and the extension cover 304 can be adjusted to adjust the contact area between the spiral protrusion 3081 and the refrigerant, thereby ensuring that the water temperature will not deviate. The fixed insert 3084 and the movable insert 3085 can enable the fitting tube 308 to perform normal water flow transportation even when the position changes.

[0052] The housing 303 has a fixed disk 306 mounted on its inner wall, a rotating disk 3061 rotatably mounted on the outer side of the fixed disk 306. A groove 3062 is provided at the center of the rotating disk 3061. A support base 3064 is provided at the center of the fixed disk 306. A rotating base 3065 is rotatably mounted inside the support base 3064. A transmission wheel 3066 is mounted on the outer side of the rotating base 3065. A plurality of force-bearing grooves 3063 are provided on the inner wall of the groove 3062. The transmission wheel 3066 docks with the plurality of force-bearing grooves 3063. When the rotating base 3065 rotates, the transmission wheel 3066 docks with the plurality of force-bearing grooves 3063, enabling the rotating disk 3061 to rotate outside the fixed disk 306. The rotating disk 3061 is fixedly connected to the movable cannula 3085, thereby driving the fitting cylinder 308 to rotate when the rotating base 3065 rotates. The spiral protrusions 3081 are used to improve the heat exchange efficiency between the water flow and the refrigerant.

[0053] In the specific configuration, the center of the rotating disk 3061 is rotatably connected to the rotating main shaft 307 through a bearing. The rotating main shaft 307 is provided with a plurality of auxiliary blades 3071 for the flow of refrigerant. The refrigerant outlet pipe 3034 is internally installed with a bearing seat 305. The bearing seat 305 is internally installed with a transmission screw 3078.

[0054] A screw sleeve frame 3083 is fixedly mounted on one end of the fitting cylinder 308 , and the shaft of the transmission screw rod 3078 is threadedly matched with the screw sleeve frame 3083 .

[0055] In the present application, a serial rotation slot 3072 is provided inside the rotating main shaft 307, a serial shaft 3075 is provided inside the serial rotation slot 3072, a limiting slot 3073 is provided in the middle of the serial rotation slot 3072, a limiting plate 3074 is provided on the shaft body of the serial shaft 3075, and the limiting plate 3074 is located inside the limiting slot 3073;

[0056] Both the transmission screw 3078 and the rotating seat 3065 are provided with docking slots 310, and docking seats 3077 are installed at both ends of the serial shaft 3075. The two ends of the rotating main shaft 307 are respectively provided with offset holes 3076, and the docking seats 3077 are limitedly matched with the adjacent docking slots 310.

[0057] When the exchange area needs to be adjusted, the serial shaft 3075 is moved to the side of the transmission screw 3078, and then the docking card seat 3077 is inserted into the docking card slot 310 located inside the transmission screw 3078, and then the serial shaft 3075 is driven to rotate by the drive motor 3091, wherein the docking card seat 3077 can be used to make the transmission screw 3078 rotate, wherein the hydraulic rod 3068 will push out the friction disk 3069 to lock the fitting cylinder 308 so that it will not rotate, so that the position of the fitting cylinder 308 can be moved under the threaded cooperation of the transmission screw 3078 and the screw sleeve frame 3083, thereby adjusting the distance between the spiral protrusion 3081 and the extension cover 304, and also adjusting the contact area between the water flow and the refrigerant.

[0058] During normal heat recovery, the serial shaft 3075 moves to the other side and docks the docking slot 310 inside the rotating seat 3065 with the docking seat 3077, and drives the serial shaft 3075 to rotate under the drive of the drive motor 3091, so that the rotating seat 3065 drives the fitting cylinder 308 to rotate, which can improve the heat recovery efficiency.

[0059] It should be noted that an adjusting cylinder 3092 is fixedly mounted on one side of the interior of the housing 303. The flow sensor 9 is signal-connected to the adjusting cylinder 3092 and the hydraulic rod 3068. A movable frame 309 is fixedly mounted on the output end of the adjusting cylinder 3092. A drive motor 3091 is fixedly mounted inside the movable frame 309. A connecting shaft 3093 is provided at the output end of the drive motor 3091. The output end of the connecting shaft 3093 passes through the rotating seat 3065 and is fixedly connected to the tandem shaft 3075. The position of the movable frame 309 can be adjusted via the flow sensor 9, thereby adjusting the position of the drive motor 3091 accordingly. The position of the tandem shaft 3075 can be adjusted via the connecting shaft 3093 during movement, thereby switching between different functions, enabling the rotation of the laminating cylinder 308 to improve heat recovery efficiency, or adjusting the area during heat exchange.

[0060] In the specific configuration, a docking hole 30611 is provided inside the fixed disk 306, and the lower end of the hot water inlet pipe 3031 is connected to the docking hole 30611. An infusion groove 30610 is provided inside the rotating disk 3061, and the infusion groove 30610 is connected to the movable cannula 3085. The docking hole 30611 and the infusion groove 30610 are connected in series.

[0061] By connecting the infusion groove 30610 with the movable cannula 3085 and connecting the docking hole 30611 in series with the infusion groove 30610, it can be ensured that the fitting cylinder 308 can stably output water flow regardless of rotation or position movement. During rotation, the rotating connection between the fixed disk 306 and the rotating disk 3061 can be used to achieve coordinated rotation, and during movement, the movable connection between the fixed cannula 3084 and the movable cannula 3085 can be used to achieve coordinated displacement.

[0062] Several expansion holes 3067 are opened on the outside of the fixed plate 306, and a hydraulic rod 3068 is fixedly installed inside each expansion hole 3067. A friction plate 3069 is fixedly installed at the output end of the hydraulic rod 3068. The friction plate 3069 is located inside the infusion tank 30610 and frictionally cooperates with the inner wall of the infusion tank 30610.

[0063] In order to fix the rotating disk 3061 when the transmission screw 3078 is threadedly engaged with the screw sleeve frame 3083, the flow sensor 9 is used to control the extension of the hydraulic rod 3068, and the friction disk 3069 is frictionally engaged with the inner wall of the infusion tank 30610, thereby preventing the fitting cylinder 308 from rotating and allowing the fitting cylinder 308 to move in position when the transmission screw 3078 is threadedly engaged with the screw sleeve frame 3083.

[0064] The working principle of a dual-temperature hot water heat recovery unit:

[0065] The second condenser 302 is the main condenser, and the temperature of the user-side hot water 2 is the priority condition. The unit adjusts the second expansion valve 6 while loading the compressor 1 to meet the temperature and flow requirements of the user-side hot water 2, and then continues to load the compressor 1 and opens the flow distribution regulating valve 2 to allow part of the refrigerant to flow into the first condenser 301. The flow distribution regulating valve 2 and the first expansion valve 5 cooperate to adjust so that the user-side hot water 1 reaches the required temperature. The liquid storage device 4 is used to adjust the amount of refrigerant circulating in the system. Under the premise of meeting the conventional hot water demand on the user side, this design prepares a certain amount of higher temperature hot water to meet customer needs, achieving the purpose of one machine with two uses. Compared with existing equipment, this application can achieve dual-temperature hot water treatment without the need for other equipment to assist in increasing and decreasing the temperature, and is more efficient in operation.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A dual-temperature hot water heat recovery unit, comprising a compressor (1), characterized in that: The outlet of the compressor (1) is connected to a flow distribution regulating valve (2) via a pipeline. The flow distribution regulating valve (2) is provided with two outlets and is connected to a recovery component (3) for preparing dual-temperature hot water. The recovery component (3) includes a first condenser (301) and a second condenser (302). The first condenser (301) is connected to an inlet of a liquid reservoir (4) via a pipeline. The outlet of the liquid reservoir (4) is connected to an inlet of a first expansion valve (5) via a pipeline. The outlet of the first expansion valve (5) is connected to one end of the second condenser (302) via a pipeline. The other end of the second condenser (302) is connected to an inlet of an evaporator (7) via a pipeline and a second expansion valve (6). The outlet of the evaporator (7) is connected to an inlet of the compressor (1) via a pipeline. The first condenser (301) and the second condenser (302) both comprise a shell (303), one end of the shell (303) being provided with a hot water inlet pipe (3031) and a refrigerant inlet pipe (3032), and the other end of the shell (303) being provided with a hot water outlet pipe (3033) and a refrigerant outlet pipe (3034); Each of the hot water outlet pipes (3033) is connected to an adjacent water tank (8), each of the hot water inlet pipes (3031) is connected to an external water pipe, the refrigerant outlet pipe (3034) located in the first condenser (301) is connected to the liquid reservoir (4), the liquid reservoir (4) and the first expansion valve (5) are connected to the refrigerant inlet pipe (3032) via a pipeline, and the refrigerant outlet pipe (3034) located in the second condenser (302) is connected to the second expansion valve (6) and the evaporator (7); An extension cover (304) is provided on the outside of the shell (303), the hot water outlet pipe (3033) is installed on the outside of the extension cover (304), and the outside of the hot water outlet pipe (3033) is connected to the water tank (8) via a flow sensor (9). A fitting cylinder (308) is provided on the inside of the shell (303), and the fitting cylinder (308) is sealed and fitted with the inner wall of the shell (303). A spiral protrusion (3081) is provided on the inside of the fitting cylinder (308), and a conveying groove is provided on the inside of the spiral protrusion (3081). The outside of the spiral protrusion (3081) is provided with an opening, and a sealing gasket (3082) is provided at the opening. The opening of the spiral protrusion (3081) communicates with the extension cover (304). A fixed insert (3084) is provided on one end of the spiral protrusion (3081), and a movable insert (3085) is movably provided on the inside of the fixed insert (3084).

2. A dual-temperature hot water heat recovery unit according to claim 1, characterized in that: A fixed disk (306) is installed on the inner wall of the shell (303), a rotating disk (3061) is rotatably installed on the outer side of the fixed disk (306), a groove (3062) is provided at the center of the rotating disk (3061), a support seat (3064) is provided at the center of the fixed disk (306), a rotating seat (3065) is rotatably installed inside the support seat (3064), a transmission wheel (3066) is installed on the outer side of the rotating seat (3065), a plurality of force-bearing grooves (3063) are provided on the inner wall of the groove (3062), and the transmission wheel (3066) is docked with the plurality of force-bearing grooves (3063).

3. A dual-temperature hot water heat recovery unit according to claim 2, characterized in that: The center of the rotating disk (3061) is rotatably connected to a rotating main shaft (307) via a bearing. The rotating main shaft (307) is provided with a plurality of auxiliary blades (3071) for the flow of refrigerant. A bearing seat (305) is installed inside the refrigerant outlet pipe (3034). A transmission screw (3078) is rotatably installed inside the bearing seat (305).

4. The dual-temperature hot water heat recovery unit according to claim 3, characterized in that: A serial rotation groove (3072) is provided inside the rotating main shaft (307), a serial shaft (3075) is provided inside the serial rotation groove (3072), a limiting groove (3073) is provided in the middle of the serial rotation groove (3072), a limiting plate (3074) is provided on the shaft body of the serial shaft (3075), and the limiting plate (3074) is located inside the limiting groove (3073).

5. The dual-temperature hot water heat recovery unit according to claim 4, characterized in that: The transmission screw (3078) and the rotating seat (3065) are both provided with docking slots (310), and docking seats (3077) are respectively installed at both ends of the serial shaft (3075). The two ends of the rotating main shaft (307) are respectively provided with offset holes (3076), and the docking seats (3077) are limitedly matched with adjacent docking slots (310).

6. The dual-temperature hot water heat recovery unit according to claim 4, characterized in that: A screw sleeve frame (3083) is fixedly mounted on one end of the fitting cylinder (308), and the shaft of the transmission screw rod (3078) is threadably engaged with the screw sleeve frame (3083).

7. The dual-temperature hot water heat recovery unit according to claim 4, characterized in that: An adjusting cylinder (3092) is fixedly installed on one side of the interior of the housing (303); the flow sensor (9) is signal-connected to the adjusting cylinder (3092) and the hydraulic rod (3068); a movable frame (309) is fixedly installed on the output end of the adjusting cylinder (3092); a driving motor (3091) is fixedly installed inside the movable frame (309); a connecting shaft (3093) is provided at the output end of the driving motor (3091); and the output end of the connecting shaft (3093) passes through a rotating seat (3065) and is fixedly connected to a series shaft (3075).

8. The dual-temperature hot water heat recovery unit according to claim 4, characterized in that: A docking hole (30611) is provided inside the fixed disk (306), and the lower end of the hot water inlet pipe (3031) is connected to the docking hole (30611). An infusion groove (30610) is provided inside the rotating disk (3061), and the infusion groove (30610) is connected to the movable cannula (3085). The docking hole (30611) and the infusion groove (30610) are connected in series. A plurality of expansion holes (3067) are provided on the outside of the fixed disk (306), and a hydraulic rod (3068) is fixedly installed inside each expansion hole (3067). A friction disk (3069) is fixedly installed at the output end of the hydraulic rod (3068), and the friction disk (3069) is located inside the infusion tank (30610) and frictionally engages with the inner wall of the infusion tank (30610).

Images