Heat pump unit and high-temperature heat pump system

Abstract

The utility model provides a heat pump unit and a high temperature heat pump system, the heat pump unit comprises a first compressor and a use side device, an inlet of the first compressor is connected with a first heat exchanger, and the first heat exchanger is used for directly or indirectly absorbing environmental heat; the use side device is connected to an outlet of the first compressor and comprises a use side heat exchanger, the use side heat exchanger is connected with the outlet of the compressor in an on-off controlled mode, and the use side heat exchanger is configured to heat air after communicating with the outlet of the compressor; and / or the direct flash evaporation heat exchange device is provided with a refrigerant inlet which is connected with the outlet of the compressor in an on-off controlled manner; the direct flash evaporation heat exchange device is further provided with a hot water outlet used for outputting hot water in an on-off controlled mode, and / or a first steam outlet used for outputting steam in an on-off controlled mode, and / or a second steam outlet connected with the evaporation compressor in an on-off controlled mode. The heat pump unit is wide in application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump technical field especially relates to a heat pump unit and high temperature heat pump system. BACKGROUND

[0002] At present, the heat pump unit of high temperature heat pump system absorbs air heat (can also be water source heat energy, ground source heat energy, composite heat source heat energy, solar energy and sewage source heat energy etc.), generates one of high temperature hot water, high temperature hot air and high temperature steam. However, in some working scenes of high temperature heat pump system, the single form of output heat has great limitation, for example, in the working scenes of brewing, chemical industry, smelting etc., need to obtain high temperature steam and high temperature hot water in turn, and even need to obtain higher temperature high temperature steam transported remotely to complete the corresponding production task. Thus cause the poor applicability of high temperature heat pump system, the problem that user demand cannot be satisfied, further lead to the problem of the cost increase of corresponding production task and the poor user experience. SUMMARY

[0003] In view of the above problem, the utility model is provided to provide a heat pump unit and high temperature heat pump system to overcome the above problem or at least partially solve the above problem.

[0004] One object of the present application is to solve the problem of single function of the existing high temperature heat pump system, to realize the effect of improving the application range of high temperature heat pump system.

[0005] Specifically, the utility model provides a heat pump unit.

[0006] The heat pump unit of the utility model includes: first compressor, the inlet of first compressor is connected first heat exchanger, and the first heat exchanger is used to directly or indirectly absorb ambient heat;Use side device, the use side device is connected on the outlet of the first compressor, and it includes: use side heat exchanger, the use side heat exchanger is connected the outlet of the compressor under the control of on-off, and the use side heat exchanger is configured to heat air after communicating with the outlet of the compressor;And / or, direct flash heat exchange device, the direct flash heat exchange device has the refrigerant inlet of the outlet of the compressor under the control of on-off;And the direct flash heat exchange device also has hot water outlet for the on-off controlled output of hot water, and / or first steam outlet for the on-off controlled output of steam, and / or second steam outlet for the on-off controlled connection of evaporative compressor.

[0007] In some embodiments, in the case that the use-side device comprises the use-side heat exchanger and the direct flash heat exchange device, a first electromagnetic valve is connected to an inlet of the use-side heat exchanger to form a first component, a second electromagnetic valve is connected to a refrigerant inlet of the direct flash heat exchange device to form a second component, and an outlet of the first component and an outlet of the second component are connected in parallel to an outlet of the first compressor; and / or, a first check valve is connected to an outlet of the use-side heat exchanger to form the first component, a second check valve is connected to a refrigerant outlet of the direct flash heat exchange device to form the second component, and an outlet of the first component and an outlet of the second component are connected in parallel to an inlet of the first heat exchanger directly or indirectly.

[0008] In some embodiments, an outlet of the first component and an outlet of the second component are connected in parallel to an inlet of the first heat exchanger indirectly via a first throttling device.

[0009] In some embodiments, in the case that the use-side device comprises the direct flash heat exchange device, the direct flash heat exchange device having the hot water outlet, the first steam outlet and the second steam outlet, a first stop valve is connected to the hot water outlet, the first steam outlet and the second steam outlet.

[0010] In some embodiments, the direct flash heat exchange device further has a backwater outlet for backflow of cooled hot water, and a second stop valve is connected to the backwater outlet.

[0011] In some embodiments, the direct flash heat exchange device further has a water supplement outlet for supplementing water into the direct flash heat exchange device.

[0012] In some embodiments, in the case that the use-side device comprises the direct flash heat exchange device, the direct flash heat exchange device having the hot water outlet, a heat storage water tank and a water delivery pipeline are connected in parallel to the hot water outlet, the heat storage water tank being configured to store the hot water, and the water delivery pipeline being configured to deliver the hot water to a target space.

[0013] In some embodiments, an inlet of the first compressor is further connected to a heat recovery heat exchanger, the heat recovery heat exchanger being arranged in parallel to the first heat exchanger, and the heat recovery heat exchanger being configured to directly or indirectly absorb the ambient heat.

[0014] The high-temperature heat pump system comprises: a high-temperature heat pump unit, the high-temperature heat pump unit comprising the heat pump unit according to any one of the preceding items; and a low-temperature heat pump unit, the low-temperature heat pump unit comprising a second compressor and a second heat exchanger connected to an inlet of the second compressor, the second heat exchanger being configured to absorb ambient heat, and an outlet of the second compressor being connected to a first heat exchanger of the heat pump unit, so as to cause the first heat exchanger to indirectly absorb the ambient heat through the low-temperature heat pump unit.

[0015] The high-temperature heat pump system comprises: a high-temperature heat pump unit, the high-temperature heat pump unit comprising the heat pump unit according to any one of the preceding items; and a low-temperature heat pump unit, the low-temperature heat pump unit comprising a second compressor, an outlet of the second compressor being connected to a four-way reversing valve, in at least one working condition, outlets of the four-way reversing valve being sequentially connected to a second heat exchanger, a third electromagnetic valve, a defrosting heat exchanger and the second compressor, the defrosting heat exchanger being connected to a heat storage water tank of the heat pump unit, so as to cause the defrosting heat exchanger to absorb heat in the heat storage water tank to release heat on the second heat exchanger in at least one of the working conditions; and in at least another working condition, the outlets of the four-way reversing valve being sequentially connected to a first heat exchanger of the heat pump unit, the second heat exchanger and the second compressor, so as to cause the first heat exchanger to indirectly absorb the ambient heat through the low-temperature heat pump unit.

[0016] The heat pump unit of the embodiment of the present application uses a side heat exchanger and a direct flash heat exchange device to be connected to an outlet of the first compressor. When the user needs hot air, the inlet of the side heat exchanger is controlled to be communicated with the outlet of the first compressor, so that the high-temperature and high-pressure refrigerant output by the first compressor heats air through the side heat exchanger, thereby generating hot air. When the user needs steam or hot water, the refrigerant inlet of the direct flash heat exchange device is controlled to be communicated with the outlet of the first compressor, so that the high-temperature and high-pressure refrigerant output by the first compressor exchanges heat with water in the direct flash heat exchange device, thereby forming hot water or steam. When the user needs high-pressure steam, the steam generated by the direct flash heat exchange device is input into the evaporation compressor through the second steam outlet for compression, so as to obtain high-pressure steam. Therefore, the heat pump unit of the embodiment of the present application can be used to generate hot air, hot water, high-pressure steam and low-pressure steam, and thus the heat pump unit of the embodiment of the present application has a large application range.

[0017] The above and other objects, advantages and features of the present application will be more apparent from the following detailed description of the embodiments of the present application, when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are by way of illustration and not limitation. Like or similar components or parts are designated by like reference numerals throughout the drawings. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0019] Figure 1 is a schematic structural diagram of a high-temperature heat pump unit according to another embodiment of the present application;

[0020] Figure 2 is a schematic structural diagram of a high-temperature heat pump unit according to another embodiment of the present application;

[0021] Figure 3 is a schematic structural diagram of a high-temperature heat pump unit according to another embodiment of the present application;

[0022] Figure 4 is a schematic structural diagram of a high-temperature heat pump system according to an embodiment of the present application;

[0023] Figure 5 is a schematic structural diagram of a direct flash heat exchanger according to an embodiment of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] high-temperature heat pump unit 100; first compressor 110; inlet 111; outlet 112; use-side device 120; use-side heat exchanger 121; inlet 122; outlet 123; fan 124; direct flash heat exchanger 130; refrigerant inlet 131; hot water outlet 132; first vapor outlet 133; second vapor outlet 134; return water inlet 135; water supplement inlet 136; refrigerant outlet 137; flash tank 138; direct heating heat exchanger 139; evaporation compressor 140; first heat exchanger 150; first electromagnetic valve 161; second electromagnetic valve 162; first stop valve 163; second stop valve 164; first check valve 165; second check valve 166; heat storage water tank 171; water supply pipeline 173; first throttling device 181; heat recovery heat exchanger 190; low-temperature heat pump unit 200; second compressor 210; second heat exchanger 220; four-way reversing valve 230; defrosting heat exchanger 240; third electromagnetic valve 250; fourth electromagnetic valve 260. DETAILED DESCRIPTION

[0026] Reference will now be made to Figures 1 to 5A heat pump unit and a high-temperature heat pump system are described herein. In the description of the embodiments, it will be understood that the terms "first", "second", etc. are used to describe various terms only and cannot be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features, that is, one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited. When a certain feature "includes or contains" a certain or certain features, unless otherwise specifically described, it indicates that other features and can further include other features.

[0027] Unless otherwise expressly specified and limited, the terms "provide", "mount", "connect", "connect", "fix", "couple" and other terms should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0028] In addition, in the description of the embodiments, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. That is, in the description of the embodiments, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" or "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is less than the second feature in horizontal height.

[0029] In the description of the embodiments, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The heat pump unit of the present application is described below with reference to the accompanying drawings.

[0031] As Figures 1-3 shown, the heat pump unit of the embodiment of the utility model includes a first compressor 110 and a use-side device 120.

[0032] The inlet 111 of the first compressor 110 is connected with a first heat exchanger 150, and the first heat exchanger 150 is used to directly or indirectly absorb ambient heat. That is to say, the first heat exchanger 150 can directly absorb the heat of the environment where the heat pump unit of the embodiment is located to heat the refrigerant entering the first compressor 110; or, the first heat exchanger 150 can also be connected with other heating equipment, so that the other heating equipment absorbs the heat of the external environment, so that the first heat exchanger 150 absorbs the heat of the connected heating equipment, to achieve the effect of indirectly absorbing ambient heat, and to enable the refrigerant to obtain more heat. For example, the first heat exchanger 150 is connected with another heat pump unit.

[0033] Among them, the first compressor 110 is not only used to drive the circulation of the refrigerant in the heat pump unit, but also to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas, so as to increase the temperature and pressure of the refrigerant, and then provide the use-side device 120 with the refrigerant having heat.

[0034] The use-side device 120 is connected to the outlet 112 of the first compressor 110, and the use-side device 120 includes a use-side heat exchanger 121 and / or a direct flash heat exchange device 130. That is to say, the use-side device 120 includes one of the use-side heat exchanger 121 and the direct flash heat exchange device 130; or, the use-side device 120 not only includes the use-side heat exchanger 121, but also includes the direct flash heat exchange device 130.

[0035] The use-side heat exchanger 121 is connected to the outlet of the compressor under the control of on-off, and the use-side heat exchanger 121 is configured to heat air after being communicated with the outlet of the compressor, that is to say, the high-temperature and high-pressure refrigerant processed by the first compressor 110 enters the use-side heat exchanger 121, and releases heat to the external air to heat the external air, and then the heated air is blown out by the fan 124, so as to form hot air.

[0036] The direct flash heat exchanger 130 has a refrigerant inlet 131 connected to the outlet of the compressor in a controlled on-off manner; and the direct flash heat exchanger 130 also has a hot water outlet 132 for outputting hot water in a controlled on-off manner, and / or a first steam outlet 133 for outputting steam in a controlled on-off manner, and / or a second steam outlet 134 connected to the evaporative compressor 140 in a controlled on-off manner. That is, the direct flash heat exchanger 130 heats the water in the direct flash heat exchanger 130 by exchanging heat with the high-temperature and high-pressure refrigerant output by the first compressor 110, thereby forming hot water or steam. When the first steam outlet 133 is turned on, the steam generated in the direct flash heat exchanger 130 is directly output from the first steam outlet 133 for use by the user; when the second steam outlet 134 is turned on, the steam generated in the direct flash heat exchanger 130 is discharged from the second steam outlet 134 and enters the evaporative compressor 140, and the steam is then formed into high-pressure steam in the evaporative compressor 140, and the high-pressure steam is discharged from the outlet of the evaporative compressor 140 for use by the user.

[0037] When hot air is needed, the inlet of the use-side heat exchanger 121 is controlled to be in communication with the outlet 112 of the first compressor 110, so that the high-temperature and high-pressure refrigerant output by the first compressor 110 enters the use-side heat exchanger 121, and the refrigerant in the use-side heat exchanger 121 exchanges heat with the ambient air through the use-side heat exchanger 121, thereby heating the ambient air to form hot air for use by the user, for example, high-temperature hot air can be used for drying or dehumidifying. After the refrigerant exchanges heat, the refrigerant is discharged from the outlet 123 of the use-side heat exchanger 121 and then circulates through the inlet of the first compressor 110.

[0038] When hot water or steam is needed, the refrigerant inlet 131 of the direct flash heat exchanger 130 is controlled to be in communication with the outlet 112 of the first compressor 110, so that the high-temperature and high-pressure refrigerant output by the first compressor 110 enters the direct flash heat exchanger 130, and the refrigerant in the direct flash heat exchanger exchanges heat with the water inside the direct flash heat exchanger, thereby heating the water to form steam for use by the user. After the refrigerant exchanges heat, the refrigerant is discharged from the refrigerant outlet 137 of the direct flash heat exchanger 130 and then circulates through the inlet of the first compressor 110.

[0039] Compared with the related art, the heat pump unit of the embodiment of the utility model, use side heat exchanger 121 and direct flash heat exchange device 130 are connected with the outlet 112 of the first compressor 110 respectively. When the user needs hot air, the inlet of the use side heat exchanger 121 can be controlled to communicate with the outlet 112 of the first compressor 110, so that the high-temperature and high-pressure refrigerant output by the first compressor 110 heats the air through the use side heat exchanger 121, thereby generating hot air. When the user needs steam or hot water, the refrigerant inlet 131 of the direct flash heat exchange device 130 can be controlled to communicate with the outlet 112 of the first compressor 110, so that the high-temperature and high-pressure refrigerant output by the first compressor 110 exchanges heat with the water in the direct flash heat exchange device 130, thereby forming hot water or steam. And when the user needs high-pressure steam, the steam generated by the direct flash heat exchange device 130 can be input into the evaporative compressor 140 through the second steam outlet 134 for compression, so as to obtain high-pressure steam. Therefore, the heat pump unit of the embodiment of the utility model can be used to generate hot air, hot water, high-pressure steam and low-pressure steam, so that the heat pump unit of the embodiment of the utility model has a larger application range.

[0040] In some embodiments, as shown in FIG. 1, in the case where the use side device 120 includes the use side heat exchanger 121 and the direct flash heat exchange device 130, the use side device 120 not only includes the use side heat exchanger 121, but also includes the direct flash heat exchange device 130. Figures 1-3

[0041] The first electromagnetic valve 161 is connected to the inlet 122 of the use side heat exchanger 121 to form a first assembly, and the second electromagnetic valve 162 is connected to the refrigerant inlet 131 of the direct flash heat exchange device 130 to form a second assembly. The inlet of the first assembly and the inlet of the second assembly are connected in parallel to the outlet 112 of the first compressor 110. That is, the use side heat exchanger 121 and the first electromagnetic valve 161 form the first assembly, and the direct flash heat exchange device 130 and the second electromagnetic valve 162 are connected to the first compressor 110 in parallel. By controlling the on-off of the first electromagnetic valve 161 and the second electromagnetic valve 162 respectively, the on-off of the use side heat exchanger 121 and the direct flash heat exchange device 130 can be controlled.

[0042] When only hot air needs to be generated, the first electromagnetic valve 161 is controlled to be turned on, and the second electromagnetic valve 162 is controlled to be turned off, so that the inlet of the use side heat exchanger 121 communicates with the outlet 112 of the first compressor 110, and the high-temperature and high-pressure refrigerant output by the first compressor 110 enters the use side heat exchanger 121, so that the refrigerant in the use side heat exchanger 121 exchanges heat with the outside air through the use side heat exchanger 121, thereby heating the outside air to form hot air.

[0043] ​When only hot water or steam is needed, the second electromagnetic valve 162 is controlled to be turned on and the first electromagnetic valve 161 is controlled to be turned off, so that the refrigerant inlet 131 of the direct flash heat exchange device 130 is communicated with the outlet 112 of the first compressor 110, and the high-temperature and high-pressure refrigerant output by the first compressor 110 enters the direct flash heat exchange device 130, so that the refrigerant in the direct flash heat exchange device is heated by the water in the direct flash heat exchange device to form steam.

[0044] When hot air and hot water or steam are needed at the same time, the first electromagnetic valve 161 and the second electromagnetic valve 162 are controlled to be turned on, so that the inlet of the use-side heat exchanger 121 and the refrigerant inlet 131 of the direct flash heat exchange device 130 are both communicated with the outlet 112 of the first compressor 110, and the high-temperature and high-pressure refrigerant output by the first compressor 110 enters the use-side heat exchanger 121 and the direct flash heat exchange device 130 respectively, so that the use-side heat exchanger 121 generates hot air and the direct flash heat exchange device 130 generates hot water or steam.

[0045] Further, as shown in FIG. 1, a first one-way valve 165 is connected to the outlet 123 of the use-side heat exchanger 121 to form a first assembly, and a second one-way valve 166 is connected to the refrigerant outlet 137 of the direct flash heat exchange device 130 to form a second assembly, and the outlet of the first assembly and the outlet of the second assembly are connected to the inlet of the first heat exchanger 150 in parallel. Figures 1-3 That is to say, by connecting the first one-way valve 165 to the outlet 123 of the use-side heat exchanger 121, it is ensured that the refrigerant flows from the first compressor 110 to the use-side heat exchanger 121 and then flows back to the first compressor 110; by connecting the second one-way valve 166 to the refrigerant outlet 137 of the direct flash heat exchange device 130, it is ensured that the refrigerant flows from the first compressor 110 to the direct flash heat exchange device 130 and then flows back to the first compressor 110. Thus, the refrigerant is circulated between the first compressor 110 and the use-side heat exchanger 121 and between the first compressor 110 and the direct flash heat exchange device 130 in a normal direction, so that the heat pump unit of the embodiment of the present application is prevented from malfunctioning.

[0046] Further, as shown in FIG. 1, the outlet of the first assembly and the outlet of the second assembly are connected to the inlet of the first heat exchanger 150 in parallel through a first throttling device 181. Figures 1-3 That is to say, the refrigerant flowing out of the direct flash heat exchange device 130 or the refrigerant flowing out of the use-side heat exchanger 121 first passes through the first throttling device 181 to be throttled, so that the pressure and temperature of the refrigerant are rapidly reduced. The low-temperature and low-pressure refrigerant enters the first heat exchanger 150, so that the refrigerant can more fully absorb heat and be heated. The refrigerant after absorbing heat reenters the first compressor 110 to start a new cycle. Through this circulation process, the effective transfer and conversion of heat are realized.

[0047] In some embodiments, such as Figures 1-3 As shown, the inlet 111 of the first compressor 110 is also connected to a heat recovery heat exchanger 190. The heat recovery heat exchanger 190 is arranged in parallel with the first heat exchanger 150, and is configured to directly or indirectly absorb heat from the target space. Thus, the heat recovery heat exchanger 190 is used to exchange heat with the air in the environment where the heat pump unit of this embodiment is located, allowing a portion of the refrigerant to absorb heat from the air in the environment through the heat recovery heat exchanger 190. On the one hand, this reduces the energy consumption of the first compressor 110, saving operating costs for the heat pump unit of this embodiment; on the other hand, it also reduces the operating load of the first compressor 110, thereby extending its service life.

[0048] In some alternative embodiments, such as Figure 5 As shown, the direct-heat flash evaporation device includes a flash tank 138 and a direct-heat exchanger 139 disposed within the flash tank 138; the outlet 112 of the first compressor 110 is connected to the direct-heat exchanger 139. The high-temperature refrigerant formed in the first compressor 110, after circulating to the direct-heat exchanger 139, can directly exchange heat with the water in the flash tank 138. Since this process occurs within the flash tank 138, unnecessary heat loss can be reduced.

[0049] The direct heat exchanger 139 has a shell-and-tube structure and consists of multiple heat exchange tubes. The high-temperature refrigerant from the first compressor 110 flows inside the heat exchange tubes, while the water in the flash tank 138 flows outside the tubes. Heat is exchanged between the two through the tube walls to produce steam or hot water. To improve heat transfer efficiency, the heat exchange tubes of the direct heat exchanger 139 are typically made of materials with high thermal conductivity, such as copper or stainless steel. Simultaneously, the refrigerant flow velocity and flow rate within the tubes need to be precisely controlled to ensure that heat is transferred evenly and rapidly to the water in the flash tank 138.

[0050] In some embodiments, such as Figure 1 and Figure 3As shown, in the case that the using-side device 120 comprises a direct flash heat exchange device 130 having a hot water outlet 132, a first steam outlet 133 and a second steam outlet 134, a first stop valve 163 is connected to the hot water outlet 132, the first steam outlet 133 and the second steam outlet 134. That is, the direct flash heat exchange device 130 is controlled to output hot water and steam to the outside through the hot water outlet 132, the first steam outlet 133 and the second steam outlet 134 respectively. When the user needs hot water, the first stop valve 163 at the hot water outlet 132 is controlled to be opened, so that the hot water generated after heat exchange of the direct flash heat exchange device 130 is discharged from the hot water outlet 132. When the user needs low-pressure steam, the first stop valve 163 at the first steam outlet 133 is controlled to be opened, so that the steam generated after heat exchange of the direct flash heat exchange device 130 is directly discharged from the first steam outlet 133. When the user needs high-pressure steam, the first stop valve 163 at the second steam outlet 134 is controlled to be opened, so that the steam generated after heat exchange of the direct flash heat exchange device 130 is directly discharged from the second steam outlet 134 and then enters the steam compressor to be pressurized, thereby generating high-pressure steam. By connecting the first stop valve 163 to the hot water outlet 132, the first steam outlet 133 and the second steam outlet 134 respectively, the direct flash heat exchange device 130 is realized to output steam and hot water under control.

[0051] Further, as shown in FIG. 1, Figure 5 the direct flash heat exchange device 130 further has a backwater outlet 135 for the hot water cooled after backflow. The backwater outlet 135 is connected with a second stop valve 164 for controlling the opening and closing of the backwater outlet 135. That is, the direct flash heat exchange device 130 can be connected with the pipeline of the water-using side, and the hot water generated by the direct flash heat exchange device 130 is transported to the water-using side and then reenters the direct flash heat exchange device 130 through the pipeline for backflow of water after use, for example, the hot water performs heat release on the water-using side to perform sterilization operation. On the one hand, the used water is recovered to the direct flash heat exchange device 130 through the backwater outlet 135, so as to supplement water to the direct flash heat exchange device 130 and improve the utilization rate of water. On the other hand, the water after heat release still has certain residual heat, and the used water is recovered to the direct flash heat exchange device 130 through the backwater outlet 135, so that the residual heat of the water can be fully utilized, thereby reducing the energy loss.

[0052] Further, as shown in FIG. 1, Figure 5 the direct flash heat exchange device 130 further has a water supplementing outlet 136 for supplementing water to the direct flash heat exchange device 130. That is, the water source outside can directly supplement water to the direct flash heat exchange device 130 through the water supplementing outlet 136, thereby improving the practicability of the direct flash heat exchange device 130.

[0053] In some embodiments, as Figure 1 and Figure 3 shown, in the case where the use-side device 120 includes a direct flash heat exchange device 130, the direct flash heat exchange device 130 has a hot water outlet 132, the hot water outlet 132 is connected in parallel with a hot water storage tank 171 and a hot water supply pipeline 173, the hot water storage tank 171 is used to store hot water, and the hot water supply pipeline 173 is used to supply hot water to a target space. The direct flash heat exchange device 130 is operated at valley electricity time, and the generated hot water is stored in the hot water storage tank 171, so that the generated hot water can be stored in the hot water storage tank 171, and waste of hot water is avoided.

[0054] The high-temperature heat pump system of the embodiments of the present application is described below with reference to the accompanying drawings.

[0055] As Figure 4 shown, the high-temperature heat pump system of the embodiments of the present application includes a high-temperature heat pump unit 100 and a low-temperature heat pump unit 200, and the high-temperature heat pump unit 100 includes the heat pump unit in any of the above embodiments.

[0056] The low-temperature heat pump unit 200 includes a second compressor 210 and a second heat exchanger 220 connected to the inlet of the second compressor 210, that is, the inlet of the second compressor 210 is connected to the second heat exchanger 220. The second heat exchanger 220 is configured to absorb ambient heat, and the outlet of the second compressor 210 is connected to the first heat exchanger 150 of the heat pump unit, so as to cause the first heat exchanger 150 to indirectly absorb ambient heat through the low-temperature heat pump unit 200.

[0057] Specifically, as Figure 4 shown, the first heat exchanger 150 includes a first heat exchange pipeline and a second heat exchange pipeline. The one end of the first heat exchange pipeline is connected to the outlet of the second compressor 210, and the other end of the first heat exchange pipeline is connected to the second heat exchanger 220. The high-temperature and high-pressure refrigerant discharged from the second compressor 210 passes through the first heat exchange pipeline and the second heat exchanger 220 in sequence and then flows back to the second compressor 210 to complete a cycle. Thus, the heat generated in the low-temperature heat pump unit 200 is transferred to the high-temperature heat pump unit 100 through the first heat exchanger 150, so as to achieve a higher temperature of the refrigerant in the high-temperature heat pump unit 100, and further achieve a better heating effect.

[0058] In some embodiments, as Figure 4 shown, the outlet of the second compressor 210 is connected to a four-way reversing valve 230, and in at least one working condition, the outlet of the four-way reversing valve 230 is sequentially connected to the second heat exchanger 220, a third electromagnetic valve 250, a defrosting heat exchanger 240, and the second compressor 210, and the defrosting heat exchanger 240 is connected to a hot water storage tank 171 of the heat pump unit, so as to cause the defrosting heat exchanger 240 to absorb heat in the hot water storage tank 171 to release heat on the second heat exchanger 220 in the at least one working condition.

[0059] And, in at least another working condition, the outlet of the four-way reversing valve 230 sequentially communicates with the first heat exchanger 150, the second heat exchanger 220 and the second compressor 210 of the heat pump unit, so as to cause the first heat exchanger 150 to indirectly absorb ambient heat through the low-temperature heat pump unit 200.

[0060] Specifically, the four-way reversing valve 230 is arranged between the outlet of the second compressor 210 and the first heat exchanger 150, the first valve port of the four-way reversing valve 230 is connected to the outlet of the second compressor 210, the second valve port is connected to the inlet of the second compressor 210, the third valve port is connected to the first heat exchanger 150, and the fourth valve port is connected to the first heat exchange side outlet of the defrosting heat exchanger 240.

[0061] One valve port of the third electromagnetic valve 250 is connected to the connecting pipeline between the outlet of the second heat exchanger 220 and the inlet of the second compressor 210, and the other valve port of the third electromagnetic valve 250 is connected to the pipeline between the third valve port of the four-way reversing valve 230 and the first heat exchanger 150; a one-way valve is arranged on the connecting pipeline between the first heat exchanger 150 and the second heat exchanger 220.

[0062] The first heat exchange side inlet of the defrosting heat exchanger 240 is connected to the pipeline between the second heat exchanger 220 and the first heat exchanger 150, and the second heat exchange side inlet and outlet of the defrosting heat exchanger 240 are respectively connected to the heat storage water tank 171. A fourth electromagnetic valve 260 is arranged at the first heat exchange side inlet.

[0063] When defrosting operation is needed for the use side heat exchanger 121, the third electromagnetic valve 250 and the fourth electromagnetic valve 260 are controlled to be opened, the first valve port and the third valve port of the four-way reversing valve 230 are communicated, and the second valve port and the fourth valve port are communicated. The refrigerant output by the second compressor 210 sequentially passes through the first valve port and the third valve port of the four-way reversing valve 230, the third control valve, the second heat exchanger 220 and the defrosting heat exchanger 240, and then returns to the second compressor 210 through the fourth valve port and the second valve port of the four-way reversing valve 230. In this process, the hot water in the heat storage water tank 171 enters the defrosting heat exchanger 240 and exchanges heat with the refrigerant in the low-temperature heat pump unit 200, so as to increase the temperature of the refrigerant in the low-temperature heat pump unit 200, and then defrost the second heat exchanger 220.

[0064] At this point, those skilled in the art should recognize that although the present application has been shown and described in detail in the above embodiments, many other variations or modifications can be directly determined or deduced according to the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variations or modifications.

Claims

1. A heat pump unit, characterized by Comprise: a first compressor, an inlet of which is connected to a first heat exchanger for directly or indirectly absorbing ambient heat; a use-side device connected to an outlet of the first compressor, and comprising: a use-side heat exchanger, an outlet of which is controllably connected to the outlet of the compressor, the use-side heat exchanger being configured to heat air after being communicated with the outlet of the compressor; and / or, a direct flash heat exchange device, which has a refrigerant inlet controllably connected to the outlet of the compressor; and the direct flash heat exchange device further has a hot water outlet for controllably outputting hot water, and / or a first steam outlet for controllably outputting steam, and / or a second steam outlet controllably connected to an evaporative compressor.

2. The heat pump unit according to claim 1, wherein, in the case where the use-side device comprises the use-side heat exchanger and the direct flash heat exchange device, a first electromagnetic valve is connected to an inlet of the use-side heat exchanger to form a first component, a second electromagnetic valve is connected to a refrigerant inlet of the direct flash heat exchange device to form a second component, and an outlet of the first component and an outlet of the second component are connected in parallel to an outlet of the first compressor; and / or, a first check valve is connected to an outlet of the use-side heat exchanger to form the first component, a second check valve is connected to a refrigerant outlet of the direct flash heat exchange device to form the second component, and an outlet of the first component and an outlet of the second component are connected in parallel to an inlet of the first heat exchanger directly or indirectly.

3. The heat pump unit according to claim 2, wherein, an outlet of the first component and an outlet of the second component are connected in parallel to an inlet of the first heat exchanger indirectly via a first throttling device.

4. The heat pump unit according to claim 1, wherein, in the case where the use-side device comprises the direct flash heat exchange device, which has the hot water outlet, the first steam outlet and the second steam outlet, a first stop valve is connected to the hot water outlet, the first steam outlet and the second steam outlet.

5. The heat pump unit according to claim 4, wherein, the direct flash heat exchange device further has a return water outlet for returning hot water after cooling, and a second stop valve is connected to the return water outlet.

6. The heat pump unit according to claim 4, wherein, the direct flash heat exchange device further has a water supplementing outlet for supplementing water into the direct flash heat exchange device.

7. The heat pump unit according to claim 1, wherein, in the case where the use-side device comprises the direct flash heat exchange device, which has the hot water outlet, a heat storage water tank and a water delivery pipeline are connected in parallel to the hot water outlet, the heat storage water tank is used to store the hot water, and the water delivery pipeline is used to deliver the hot water to a target space.

8. The heat pump unit according to claim 1, wherein, The inlet of the first compressor is also connected to a heat recovery heat exchanger, which is arranged in parallel with the first heat exchanger, and is configured to directly or indirectly absorb the ambient heat.

9. A high temperature heat pump system, characterized by The application further provides a high-temperature heat pump unit, comprising the heat pump unit according to any one of claims 1 to 8. The application further provides a low-temperature heat pump unit, comprising a second compressor and a second heat exchanger connected to the inlet of the second compressor, wherein the second heat exchanger is configured to absorb the ambient heat, and the outlet of the second compressor is connected to the first heat exchanger of the heat pump unit, so as to cause the first heat exchanger to indirectly absorb the ambient heat via the low-temperature heat pump unit. The application further provides a high-temperature heat pump unit, comprising the heat pump unit according to claim 7.

10. A high temperature heat pump system, characterized by, The application further provides a low-temperature heat pump unit, comprising a second compressor, wherein the outlet of the second compressor is connected to a four-way reversing valve, and in at least one working condition, the outlet of the four-way reversing valve is sequentially connected to a second heat exchanger, a third solenoid valve, a defrosting heat exchanger and the second compressor, and the defrosting heat exchanger is connected to a heat storage water tank of the heat pump unit, so as to cause the defrosting heat exchanger to absorb heat in the heat storage water tank to release heat on the second heat exchanger in at least one of the working conditions. In at least another working condition, the outlet of the four-way reversing valve is sequentially connected to a first heat exchanger, the second heat exchanger and the second compressor of the heat pump unit, so as to cause the first heat exchanger to indirectly absorb the ambient heat via the low-temperature heat pump unit. ​ ​

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