Cold air and waste heat recovery type heat pump device

Abstract

The utility model discloses a cold air and waste heat recovery type heat pump device, and relates to the technical field of liquid heaters. The cold air and waste heat recovery type heat pump device comprises a heat pump water heater, a heat preservation assembly and an air exhaust assembly. The expansion valve and the evaporator are sequentially communicated through a pipeline; the two ends of the condenser communicate with the compressor and the expansion valve correspondingly. The condenser is connected with the heat preservation water tank through a pipeline; one end of the heat preservation air pipe is arranged on one side of the evaporator, and the other end of the heat preservation air pipe communicates with the indoor space. The two-way fan is arranged in the heat preservation air pipe. When the indoor temperature is high in summer, the two-way draught fan can suck low-temperature gas around the evaporator into a room so as to reduce the indoor temperature, and when the outdoor temperature is low in winter, the two-way draught fan can suck high-temperature gas in the room to the evaporator so as to defrost the evaporator through indoor waste heat.

Description

Technical Field

[0001] This utility model relates to the field of liquid heater technology, and in particular to a heat pump device for recovering cold air and waste heat. Background Technology

[0002] Currently, air source heat pump water heating systems on the market are divided into many types. Among them, traditional heat pump water heating systems use a compressor to compress low-temperature, low-pressure refrigerant into a high-temperature, high-pressure state, and then input the high-temperature, high-pressure refrigerant back into the pipeline. The pipeline containing the high-temperature, high-pressure refrigerant heats the water in the tank. However, the evaporator of the heat pump water heating system produces cold air during operation, and this cold air is usually released into the air. In addition, in winter, when the ambient temperature is low, the evaporator surface is prone to frost formation. The frost covering the evaporator surface will hinder the conduction and dissipation of cold energy, affecting the normal operation of the heat pump water heating system. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects in the prior art and provide a cold air and waste heat recovery type heat pump device, which can draw the low-temperature gas around the evaporator into the room through a bidirectional fan, and can also use the waste heat in the room to defrost the evaporator.

[0004] To achieve the above objectives, this utility model provides a heat pump device for recovering cold air and waste heat. The heat pump device includes a heat pump water heater, an insulation component, and an extraction component. The heat pump water heater includes an expansion valve, an evaporator, a compressor, and a condenser. The expansion valve, the evaporator, and the compressor are sequentially connected via pipelines. The refrigerant side of the condenser is connected to the compressor and the expansion valve, respectively. The insulation component includes an insulated water tank, connecting pipes, and a hot water pump. The insulated water tank is hollow inside. Two connecting pipes are provided, with their ends connected to the water side of the insulated water tank and the condenser, respectively. The hot water pump is mounted on one of the connecting pipes. The extraction component includes an insulated duct and a bidirectional fan. One end of the insulated duct is located on one side of the evaporator, and the other end is connected to the indoor environment. The bidirectional fan is located inside the insulated duct.

[0005] Furthermore, the evaporator has two rows of heat exchange tubes.

[0006] Furthermore, the two heat exchange tubes are arranged in parallel and spaced apart, with one end of the heat-insulating air duct located between the two heat exchange tubes.

[0007] Furthermore, the heat exchange tube is provided with a finned structure on its periphery.

[0008] Furthermore, it also includes a floor heating system, which includes a floor heating coil, a heat exchange coil, and a floor heating water pump; the floor heating water pump is installed on the heat exchange coil; both ends of the heat exchange coil are respectively connected to both ends of the floor heating coil to form a circulation loop; the heat exchange coil is at least partially located in the insulated water tank, and the floor heating coil is used to heat the room.

[0009] Furthermore, the two connecting pipes are a first connecting pipe and a second connecting pipe; the height of the end of the first connecting pipe connected to the insulated water tank is higher than the height of the end of the second connecting pipe connected to the insulated water tank; the end of the second connecting pipe connected to the insulated water tank is positioned towards the portion of the heat exchange coil located inside the insulated water tank.

[0010] Furthermore, the insulated water tank has an inlet and an outlet, with the height of the inlet being lower than the height of the outlet.

[0011] Furthermore, the heat pump water heater also includes a heat pump fan, which is located on one side of the evaporator.

[0012] Furthermore, it also includes a control component, which includes a first temperature sensor, a second temperature sensor, and a control element. The control element is electrically connected to the first temperature sensor, the second temperature sensor, and the bidirectional fan, respectively. The first temperature sensor is located on one side of the evaporator and is used to detect the temperature of the evaporator. The second temperature sensor is used to detect the indoor temperature.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. After the compressor compresses the refrigerant, the high-temperature and high-pressure refrigerant is input from the compressor into the condenser, which heats the water in the condenser. The condenser and the insulated water tank are connected by two connecting pipes. One of the connecting pipes is equipped with a hot water pump. The hot water pump drives the water in the condenser and the insulated water tank to circulate between the condenser and the insulated water tank through the connecting pipe, so that the heat pump water heater can heat the water in the insulated water tank.

[0015] 2. The refrigerant inside the evaporator absorbs heat and vaporizes, which lowers the temperature around the evaporator. One end of the insulated air duct is located on one side of the evaporator. In summer, when the indoor temperature is high, the bidirectional fan can draw the cooler air around the evaporator into the room to lower the indoor temperature. In winter, when the outdoor temperature is low, the bidirectional fan can draw the warmer air from the room to the evaporator to raise the evaporator temperature. This utilizes the waste heat from the room to defrost the evaporator, ensuring stable operation of the evaporator and the normal operation of the heat pump water heater. Attached Figure Description

[0016] To more clearly illustrate the technology in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the cooling and waste heat recovery type heat pump device of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the heat pump water heater of the air conditioning and waste heat recovery type heat pump device of this utility model;

[0019] Figure 3 This is another structural schematic diagram of the heat pump water heater of the cold air and waste heat recovery type heat pump device of this utility model;

[0020] Figure 4 for Figure 3 Another structural schematic diagram of the heat pump water heater of the cold air and waste heat recovery type heat pump device of this utility model;

[0021] Figure 5 for Figure 3 This is a structural schematic diagram of the heat pump water heater of the present invention, which is a type of heat pump device for recovering cold air and waste heat.

[0022] Figure label:

[0023] Heat pump water heater 100; expansion valve 110; evaporator 120; heat exchange tube 121; finned structure 122; compressor 130; condenser 140; heat pump fan 160; insulation component 200; insulated water tank 210; connecting pipe 220; first connecting pipe 221; second connecting pipe 222; hot water pump 230; air extraction component 300; insulated air duct 310; bidirectional fan 320; underfloor heating component 400; underfloor heating coil 410; heat exchange coil 420; underfloor heating water pump 430. Detailed Implementation

[0024] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0027] Please see Figures 1 to 5 This utility model provides a heat pump device for recovering cold air and waste heat. The heat pump device includes a heat pump water heater 100, an insulation component 200, and an extraction component 300. The heat pump water heater 100 includes an expansion valve 110, an evaporator 120, a compressor 130, and a condenser 140. The expansion valve 110, evaporator 120, and compressor 130 are sequentially connected via pipelines. The refrigerant side of the condenser 140 is connected to the compressor 130 and the expansion valve 110, respectively. The insulation component 200 includes an insulated water tank 210, a connecting... The system includes a connecting pipe 220 and a hot water pump 230; the insulated water tank 210 is hollow inside, and there are two connecting pipes 220, with the two ends of the connecting pipes 220 connected to the water side of the insulated water tank 210 and the condenser 140, respectively; the hot water pump 230 is installed on one of the connecting pipes 220; the exhaust assembly 300 includes an insulated air duct 310 and a bidirectional fan 320; one end of the insulated air duct 310 is installed on one side of the evaporator 120, and the other end of the insulated air duct 310 is used to connect to the indoor environment; the bidirectional fan 320 is installed inside the insulated air duct 310.

[0028] After the compressor 130 compresses the refrigerant, the high-temperature and high-pressure refrigerant is input from the compressor 130 into the condenser 140, so that the high-temperature and high-pressure refrigerant can heat the water in the condenser 140. The insulated water tank 210 is connected to the condenser 140 through two connecting pipes 220. One of the connecting pipes 220 is equipped with a hot water pump 230. The hot water pump 230 can drive the water in the insulated water tank 210 and the condenser 140 to circulate between the insulated water tank 210 and the condenser 140 through the connecting pipe 220, so that the heat pump water heater 100 can heat the water in the insulated water tank 210.

[0029] The refrigerant inside the evaporator 120 absorbs heat and vaporizes, which lowers the temperature around the evaporator 120. One end of the insulated air duct 310 is located on one side of the evaporator 120. In summer, when the indoor temperature is high, the bidirectional fan 320 can draw the cooler air around the evaporator 120 into the room to lower the indoor temperature. In winter, when the outdoor temperature is low, the bidirectional fan 320 can draw the warmer air from the room to the evaporator 120 to raise the temperature of the evaporator 120. This utilizes the waste heat from the room to defrost the evaporator 120, ensuring that the evaporator 120 can work stably and that the heat pump water heater 100 can work normally.

[0030] Reference Figure 2 Specifically, the two ends of the refrigerant side of the condenser 140 are two port structures connected by the heat exchange pipe structure of the condenser 140. The two ends of the refrigerant side of the condenser 140 are used to connect to the evaporator 120 and the compressor 130 respectively. The refrigerant flowing in the expansion valve 110, evaporator 120, compressor 130 and pipeline can enter the condenser through one end of the refrigerant side of the condenser 140 and then flow out of the condenser through the other end of the refrigerant side of the condenser 140 and enter the expansion valve 110. The two ends of the water side of the condenser 140 are two port structures of the box structure of the condenser 140. The heat exchange pipe structure of the condenser 140 is built into the box structure of 140, so that the heat exchange pipe structure can exchange heat with the water in the box structure. The condenser 140 has four ports, two of which are refrigerant side ports and two of which are not connected to each other.

[0031] Reference Figure 2 In some embodiments of this utility model, the evaporator 120 has two rows of heat exchange tubes 121, and fins 122 are threaded onto the two rows of heat exchange tubes. The evaporator 120 also has an enclosure structure, which allows air to flow only through the fins and the insulated air duct 310. When only the heat pump fan 160 is started, a negative pressure is created, causing air to flow through the two rows of heat exchange tubes 121 for heat exchange. Since the air resistance of the insulated air duct 310 is much greater than the air resistance of the fins 122, and the air resistance of the bidirectional fan 320 installed inside the insulated air duct is relatively large, the air flow inside the insulated air duct can be basically ignored at this time.

[0032] Specifically, the evaporator 120 is provided with refrigerant lines between the compressor 130 and the expansion valve 110, and the refrigerant lines are connected to the two heat exchange tubes 121, so that the refrigerant can enter the two heat exchange tubes 121 for heat exchange.

[0033] Reference Figure 2 In some embodiments of this utility model, two heat exchange tubes 121 are arranged in parallel and spaced apart, and one end of the heat-insulating air duct 310 is located between the two heat exchange tubes 121.

[0034] Two heat exchange tubes 121 are arranged in parallel and spaced a certain distance apart, so that one end of the insulated air duct 310 can be placed between the two heat exchange tubes 121. This allows the bidirectional fan 320 to draw the cooler air around the two heat exchange tubes 121 into the room, making full use of the cooling energy emitted by the evaporator 120. The bidirectional fan 320 can also draw the warmer air from the room into the space between the two heat exchange tubes 121, making full use of the warmer air to heat up the two heat exchange tubes 121.

[0035] Reference Figure 2 In some embodiments of this utility model, a finned structure 122 is provided on the periphery of the heat exchange tube 121 to improve the efficiency of heat exchange between the heat exchange tube 121 and the surrounding environment.

[0036] Specifically, the fin structure 122 surrounds the heat exchange tube 121 and extends along the length of the heat exchange tube 121; the fin structure 122 is installed on both heat exchange tubes 121.

[0037] Reference Figure 1 and Figure 2 In some embodiments of this utility model, a floor heating component 400 is also included. The floor heating component 400 includes a floor heating coil 410, a heat exchange coil 420, and a floor heating water pump 430. The two ends of the heat exchange coil 420 are respectively connected to the two ends of the floor heating coil 410 to form a circulation loop. The heat exchange coil 420 is at least partially located in the insulated water tank 210. The floor heating water pump 430 is disposed in the heat exchange coil 420, and the floor heating coil 410 is used to heat the room.

[0038] The floor heating water pump 430 is installed on the heat exchange coil 420 to drive the fluid flow in the heat exchange coil 420 and the floor heating coil 410. When the fluid flows to the heat exchange coil 420 located in the insulated water tank 210, the water in the insulated water tank 210 can heat the fluid inside the heat exchange coil 420 to increase the temperature of the fluid inside the heat exchange coil 420. The higher temperature fluid flows into the floor heating coil 410 so that the floor heating coil 410 can heat the room.

[0039] When the outdoor temperature is low, the bidirectional fan 320 can draw the warmer indoor air to the evaporator 120, raising the temperature of the evaporator 120 and defrosting it.

[0040] Reference Figure 1In some embodiments of this utility model, the two connecting pipes 220 are respectively the first connecting pipe 221 and the second connecting pipe 222; the height of the end of the first connecting pipe 221 connected to the insulated water tank 210 is higher than the height of the end of the second connecting pipe 222 connected to the insulated water tank 210; the end of the second connecting pipe 222 connected to the insulated water tank 210 is arranged towards the part of the heat exchange coil 420 located inside the insulated water tank 210.

[0041] The water in the condenser 140 is heated to become hot water. The hot water enters the higher part of the insulated water tank 210 through the first connecting pipe 221, while the water in the lower part of the insulated water tank 210 enters the insulated water tank 210 through the second connecting pipe 222. The end of the second connecting pipe 222 that connects to the insulated water tank 210 is positioned towards the part of the heat exchange coil 420 located inside the insulated water tank 210. The water temperature at the end of the second connecting pipe 222 that connects to the insulated water tank 210 is lower, making it suitable for underfloor heating. The water temperature at the end of the first connecting pipe 221 that connects to the insulated water tank 210 is higher, making it suitable for home use.

[0042] In some embodiments of this utility model, the insulated water tank 210 has an inlet and an outlet, with the height of the inlet being lower than the height of the outlet to ensure that the high-temperature water is at the top.

[0043] Specifically, the outlet is located at the top of the insulated water tank 210, so that after the water enters the insulated water tank 210 from the inlet, it can fill the insulated water tank 210 before being discharged, thus ensuring the stability of the operation.

[0044] Reference Figure 2 In some embodiments of this utility model, the heat pump water heater 100 further includes a heat pump fan 160, which is disposed on one side of the evaporator 120.

[0045] After the heat pump fan 160 starts, it will create a negative pressure. Under the action of atmospheric pressure, the air flows through the two rows of heat exchange tubes 121, which increases the speed of heat exchange between the evaporator 120 and the surrounding air, ensuring that the heat pump water heater can work stably.

[0046] Specifically, if one of the heat pump fan 160 and the bidirectional fan 320 is started, the other will be stopped to avoid mutual interference.

[0047] In some embodiments of this utility model, a control component is also included. The control component includes a first temperature sensor, a second temperature sensor, and a control element. The control element is electrically connected to the first temperature sensor, the second temperature sensor, and the bidirectional fan 320, respectively. The first temperature sensor is disposed on one side of the evaporator 120 and is used to detect the temperature of the evaporator 120. The second temperature sensor is used to detect the indoor temperature.

[0048] When the first temperature sensor detects that the temperature of the evaporator 120 is lower than the first preset value, and combined with other parameters for defrosting, when the defrosting conditions are met, the controller first stops the compressor 130, then stops the heat pump fan 160, and then starts the bidirectional fan 320 to draw the higher temperature air in the room to the evaporator 120, thereby raising the temperature of the evaporator 120 and defrosting the evaporator 120. After defrosting is completed, the bidirectional fan 320 is stopped, and then the compressor 130 and the heat pump fan 160 are started to begin heating.

[0049] When the second temperature sensor detects that the indoor temperature is higher than the second preset value, the heat pump fan 160 stops and the bidirectional fan 320 starts, so that the cooler air around the evaporator 120 can be drawn into the room to lower the indoor temperature.

[0050] The first preset value is generally -3℃, and the second preset value is generally 24℃; of course, depending on the specific circumstances, the first and second preset values ​​can be other temperatures.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat pump device for recovering cold air and waste heat, characterized in that, include: A heat pump water heater (100) includes an expansion valve (110), an evaporator (120), a compressor (130), and a condenser (140); the expansion valve (110), the evaporator (120), and the compressor (130) are connected in sequence via pipelines; the refrigerant side of the condenser (140) is connected to the compressor (130) and the expansion valve (110) respectively. The insulation component (200) includes an insulated water tank (210), a connecting pipe (220), and a hot water pump (230); the insulated water tank (210) is hollow inside, and there are two connecting pipes (220), with the two ends of the connecting pipes (220) respectively connected to the water side of the insulated water tank (210) and the condenser (140); the hot water pump (230) is mounted on one of the connecting pipes (220). The exhaust assembly (300) includes an insulated air duct (310) and a bidirectional fan (320); one end of the insulated air duct (310) is located on one side of the evaporator (120), and the other end of the insulated air duct (310) is used to communicate with the room; the bidirectional fan (320) is located inside the insulated air duct (310).

2. The air conditioning and waste heat recovery type heat pump device according to claim 1, characterized in that, The evaporator (120) has two rows of heat exchange tubes (121).

3. The air conditioning and waste heat recovery type heat pump device according to claim 2, characterized in that, The two heat exchange tubes (121) are arranged in parallel and spaced apart, and one end of the heat-insulating air duct (310) is located between the two heat exchange tubes (121).

4. The air conditioning and waste heat recovery type heat pump device according to claim 2, characterized in that, The heat exchange tube (121) is provided with a finned structure (122) on its periphery.

5. The air conditioning and waste heat recovery type heat pump device according to claim 1, characterized in that, It also includes a floor heating component (400), which includes a floor heating coil (410), a heat exchange coil (420), and a floor heating water pump (430); the floor heating water pump (430) is installed on the heat exchange coil (420); the two ends of the heat exchange coil (420) are respectively connected to the two ends of the floor heating coil (410) to form a circulation loop; the heat exchange coil (420) is at least partially located in the insulated water tank (210), and the floor heating coil (410) is used to heat the room.

6. The air conditioning and waste heat recovery type heat pump device according to claim 5, characterized in that, The two connecting pipes (220) are a first connecting pipe (221) and a second connecting pipe (222); the height of the end of the first connecting pipe (221) connected to the insulated water tank (210) is higher than the height of the end of the second connecting pipe (222) connected to the insulated water tank (210); the end of the second connecting pipe (222) connected to the insulated water tank (210) is arranged towards the part of the heat exchange coil (420) located inside the insulated water tank (210).

7. The air conditioning and waste heat recovery type heat pump device according to claim 1, characterized in that, The insulated water tank (210) has an inlet and an outlet, with the height of the inlet being lower than the height of the outlet.

8. The air conditioning and waste heat recovery type heat pump device according to claim 1, characterized in that, The heat pump water heater (100) also includes a heat pump fan (160), which is located on one side of the evaporator (120).

9. The air conditioning and waste heat recovery type heat pump device according to claim 1, characterized in that, It also includes a control component, which includes a first temperature sensor, a second temperature sensor, and a control unit. The control unit is electrically connected to the first temperature sensor, the second temperature sensor, and the bidirectional fan (320), respectively. The first temperature sensor is located on one side of the evaporator (120) and is used to detect the temperature of the evaporator (120). The second temperature sensor is used to detect the indoor temperature.

Images