Heat pump unit
The heat pump unit design with a larger first heat exchange area addresses efficiency and temperature limitations, enhancing energy efficiency and output power through optimized heat transfer.
Patent Information
- Application Number
- CN202420428311.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-06
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-06
AI Technical Summary
Traditional heat pump units have low energy efficiency ratios and are limited in their ability to increase temperature, failing to achieve higher temperatures like 70°C.
A heat pump unit design with a larger heat exchange area in the first heat exchange device compared to the second, featuring a sequential flow through a compression device, first heat exchange device, throttling device, and second heat exchange device, optionally with multiple parallel devices and additional components like liquid storage and gas-liquid separation.
Improves energy efficiency ratio, ensures reasonable heating efficiency, and enhances output power by optimizing condensing temperature and heat transfer.
Smart Images
Figure CN222230945U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of heating technology, and specifically relates to a heat pump unit. Background Art
[0002] The heat pump unit is an efficient and energy-saving device that makes full use of low-grade thermal energy. It can extract heat from the low-temperature heat source through the reverse Carnot principle to achieve the purpose of heating the high-temperature heat source. Its working principle is: the compressor compresses the heat exchange medium, and the temperature of the heat exchange medium increases after compression, and it releases heat to the high-temperature heat source through the condenser. The heat exchange medium after heat exchange returns to the compressor for the next cycle. In this process, the heat in the low-temperature heat source is absorbed by the evaporator and introduced into the heat exchange medium, and then introduced into the high-temperature heat source through the heat exchange medium, so as to transfer the heat energy of the low-temperature heat source to the high-temperature heat source. However, at present, the traditional heat pump unit has a low energy efficiency ratio and can only increase the temperature moderately, but cannot reach a higher temperature (such as 70°C). Utility Model Content
[0003] Therefore, the technical problem to be solved by the present application is to provide a heat pump unit that can fully improve the energy efficiency ratio of heating and ensure the heating efficiency.
[0004] In order to solve the above problems, the present application provides a heat pump unit, comprising a compression device, a first heat exchange device, a throttling device, and a second heat exchange device which are sequentially connected along the flow direction of a heat exchange medium, wherein the second heat exchange device is used to absorb heat from a low-temperature heat source, and the first heat exchange device is used to release heat to a high-temperature heat source, and the heat exchange medium sequentially flows through the compression device, the first heat exchange device, the throttling device, and the second heat exchange device, and then flows back to the compression device, and the cycle is repeated;
[0005] Wherein, the heat exchange area of the first heat exchange device is larger than the heat exchange area of the second heat exchange device.
[0006] Optionally, the heat exchange area of the first heat exchange device is 1 to 2 times the heat exchange area of the second heat exchange device.
[0007] Optionally, a plurality of the first heat exchange devices are provided, and the plurality of the first heat exchange devices are arranged in parallel.
[0008] Optionally, a plurality of the second heat exchange devices are provided, and the plurality of the second heat exchange devices are arranged in parallel.
[0009] Optionally, the first heat exchange device is a condenser.
[0010] Optionally, the second heat exchange device is an evaporator.
[0011] Optionally, the throttling device is an expansion valve.
[0012] Optionally, the heat pump unit further includes a liquid storage device, wherein the liquid storage device is disposed between the first heat exchange device and the throttling device, and the first heat exchange device, the liquid storage device and the throttling device are connected in sequence.
[0013] Optionally, the heat pump unit further includes a gas-liquid separation device, which is disposed between the second heat exchange device and the compression device, and the second heat exchange device, the gas-liquid separation device and the compression device are sequentially connected.
[0014] Beneficial Effects
[0015] The heat pump unit provided in the embodiment of the utility model can improve the energy efficiency ratio of the heat pump unit for heating by setting the heat exchange area of the first heat exchange device to be larger than the heat exchange area of the second heat exchange device, ensure the heating efficiency, make the condensing temperature of the heat pump unit during heating more reasonable, and improve the output power of the heat pump unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the heat pump unit according to an embodiment of the present application.
[0017] The reference numerals are as follows:
[0018] 1. Compression device; 2. First heat exchange device; 3. Throttling device; 4. Second heat exchange device; 5. Liquid storage device; 6. Gas-liquid separation device. DETAILED DESCRIPTION
[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0021] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0023] See also Figure 1 As shown, according to an embodiment of the present application, a heat pump unit includes a compression device 1, a first heat exchange device 2, a throttling device 3 and a second heat exchange device 4 which are sequentially connected along the flow direction of the heat exchange medium, the second heat exchange device 4 is used to absorb heat from a low-temperature heat source, the first heat exchange device 2 is used to release heat to a high-temperature heat source, the heat exchange medium sequentially flows through the compression device 1, the first heat exchange device 2, the throttling device 3, the second heat exchange device 4, and then flows back to the compression device 1, and circulates in this way; wherein, the heat exchange area of the first heat exchange device 2 is larger than the heat exchange area of the second heat exchange device 4.
[0024] The heat pump unit provided in the embodiment of the utility model can improve the energy efficiency ratio of the heat pump unit for heating by setting the heat exchange area of the first heat exchange device 2 to be larger than the heat exchange area of the second heat exchange device 4, ensure the heating efficiency, make the condensing temperature of the heat pump unit during heating more reasonable, and improve the output power of the heat pump unit.
[0025] The compression device 1 may be a compressor.
[0026] Specifically, the heat pump unit also includes a drive motor, which is connected to the compression device 1. The drive motor is used to drive the compression device 1 to operate. When the compression device 1 is in operation, it can compress the low-temperature and low-pressure gas entering the compression device 1 into high-temperature and high-pressure steam.
[0027] Among them, the first heat exchange device 2 can be a condenser.
[0028] Specifically, the first heat exchange device 2 is connected to the compression device 1, and the first heat exchange device 2 is arranged on the downstream side of the compression device 1 along the flow path direction. After the high-temperature and high-pressure steam discharged from the compression device 1 enters the first heat exchange device 2, it can be liquefied in the first heat exchange device 2, and is converted from high-temperature and high-pressure steam to high-temperature and high-pressure liquid. At this time, the first heat exchange device 2 can release heat to the high-temperature heat source.
[0029] The flow direction is the flow direction of the heat exchange medium.
[0030] Among them, the throttling device 3 can be a capillary tube or an expansion valve, etc. In the embodiment of the present application, the throttling device 3 is an expansion valve.
[0031] Specifically, the throttling device 3 is connected to the first heat exchange device 2, and the throttling device 3 is arranged on the downstream side of the first heat exchange device 2 along the flow path direction. After the high-temperature and high-pressure liquid discharged from the first heat exchange device 2 enters the throttling device 3, it can be throttled and depressurized in the throttling device 3, and the high-temperature and high-pressure liquid is converted into a low-temperature and low-pressure gas-liquid mixture that is easy to evaporate.
[0032] The second heat exchange device 4 may be an evaporator.
[0033] Specifically, the second heat exchange device 4 is connected to the throttling device 3, and the second heat exchange device 4 is arranged on the downstream side of the throttling device 3 along the flow path direction. After the easily evaporated low-temperature and low-pressure gas-liquid mixture discharged from the throttling device 3 enters the second heat exchange device 4, it can be vaporized in the second heat exchange device 4, and the low-temperature and low-pressure gas-liquid mixture is converted into a low-temperature and low-pressure gas. At this time, the second heat exchange device 4 can absorb the heat of the low-temperature heat source.
[0034] Among them, when the heat pump unit is working, the heat exchange medium in the heat pump unit flows through the compressor, condenser, expansion valve and evaporator in sequence, and circulates in this way. The high-pressure steam discharged by the compressor enters the condenser, and the heat exchange medium vapor is condensed into liquid and releases heat to the high-temperature heat source, enters the evaporator through the throttle valve, and absorbs heat in the evaporator. The evaporated heat exchange medium vapor is sucked into the compressor and re-compressed. It can be understood that the heat exchange medium circulates in the heat pump unit to achieve the purpose of transferring the heat from the low-temperature heat source to the high-temperature heat source.
[0035] Specifically, the heat exchange area of the condenser is larger than the heat exchange area of the evaporator. It is understandable that when the heat exchange area of the condenser increases, the heat exchange space increases, that is, the heat exchange area of the gaseous heat exchange medium in the condenser condenses into a liquid state increases, which increases the condensation rate, so that the supercooling degree of the liquid heat exchange medium after condensation will increase, so that it can absorb more heat from the low-temperature heat source when flowing through the evaporator, thereby achieving the purpose of improving the energy efficiency ratio of the heat pump unit.
[0036] In some possible embodiments provided by the present disclosure, the heat exchange area of the first heat exchange device 2 is 1 to 2 times the heat exchange area of the second heat exchange device 4 .
[0037] For example, the heat exchange area of the first heat exchange device 2 can be 1.10 times, 1.20 times, 1.30 times, 1.40 times, 1.50 times, 1.60 times, 1.70 times, 1.80 times, 1.90 times or 2.00 times the heat exchange area of the second heat exchange device 4.
[0038] Specifically, in the embodiment of the present application, the heat exchange area of the first heat exchange device 2 is 1.10 times the heat exchange area of the second heat exchange device 4, thereby being able to fully improve the energy efficiency ratio of the heat pump unit for heating, ensure good heating efficiency, make the condensing temperature during heating more reasonable, and improve the output power of the heat pump unit.
[0039] In some possible embodiments provided by the present disclosure, a plurality of first heat exchange devices 2 are provided, and the plurality of first heat exchange devices 2 are arranged in parallel.
[0040] Among them, the number of the first heat exchange device 2 can be one, two, three, four or five.
[0041] Specifically, multiple first heat exchange devices 2 are arranged in parallel. By arranging multiple first heat exchange devices 2, the rate of releasing heat to the low-temperature heat source can be increased, the application scenarios of the heat pump unit can be expanded, and the user experience is improved.
[0042] In some possible embodiments provided by the present disclosure, a plurality of second heat exchange devices 4 are provided, and the plurality of second heat exchange devices 4 are arranged in parallel.
[0043] Among them, the number of the second heat exchange devices 4 can be one, two, three, four or five.
[0044] Specifically, a plurality of second heat exchange devices 4 are arranged in parallel. By arranging a plurality of second heat exchange devices 4, the absorption rate of heat from the low-temperature heat source can be increased, the application scenarios of the heat pump unit can be expanded, and the user experience is improved.
[0045] It should be noted that the number of first heat exchange devices 2 is greater than the number of second heat exchange devices 4, which can improve the energy efficiency ratio of the heat pump unit for heating, ensure the heating efficiency, make the condensing temperature of the heat pump unit during heating more reasonable, and improve the output power of the heat pump unit.
[0046] The heat pump unit provided in the embodiment of the utility model can improve the energy efficiency ratio of the heat pump unit for heating by setting the heat exchange area of the first heat exchange device 2 to be larger than the heat exchange area of the second heat exchange device 4, ensure the heating efficiency, make the condensing temperature of the heat pump unit during heating more reasonable, and improve the output power of the heat pump unit.
[0047] In some possible embodiments provided by the present disclosure, the heat pump unit also includes a liquid storage device 5, which is arranged between the first heat exchange device 2 and the throttling device 3, and the first heat exchange device 2, the liquid storage device 5 and the throttling device 3 are connected in sequence.
[0048] The liquid storage device 5 may be a liquid storage tank.
[0049] Specifically, the liquid storage device 5 is connected to the first heat exchange device 2, and the liquid storage device 5 is arranged on the downstream side of the first heat exchange device 2 along the flow path direction. By arranging the liquid storage device 5, part of the liquid heat exchange medium can be stored to reduce the load of the second heat exchange device 4, and the working stability of the heat pump unit can be improved.
[0050] In some possible embodiments provided by the present disclosure, the heat pump unit also includes a gas-liquid separation device 6, which is arranged between the second heat exchange device 4 and the compression device 1, and the second heat exchange device 4, the gas-liquid separation device 6 and the compression device 1 are connected in sequence.
[0051] Among them, the gas-liquid separation device 6 can be a gas-liquid separator.
[0052] Specifically, the gas-liquid separation device 6 is connected to the compression device 1, and the gas-liquid separation device 6 is arranged on the upstream side of the compression device 1 along the flow path direction. By providing the gas-liquid separation device 6, it is possible to prevent the liquid heat exchange medium from entering the compression device 1, causing an abnormal impact accident in the compression device 1, and improve the working stability of the heat pump unit.
[0053] The heat pump unit provided in the embodiment of the utility model can improve the energy efficiency ratio of the heat pump unit for heating by setting the heat exchange area of the first heat exchange device 2 to be larger than the heat exchange area of the second heat exchange device 4, ensure the heating efficiency, make the condensing temperature of the heat pump unit during heating more reasonable, and improve the output power of the heat pump unit.
[0054] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.
[0055] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.
Claims
1. A heat pump unit, characterized in that: The heat exchange device comprises a compression device (1), a first heat exchange device (2), a throttling device (3) and a second heat exchange device (4) which are sequentially connected along the flow direction of the heat exchange medium, the second heat exchange device (4) is used to absorb heat from a low-temperature heat source, the first heat exchange device (2) is used to release heat to a high-temperature heat source, the heat exchange medium sequentially flows through the compression device (1), the first heat exchange device (2), the throttling device (3), the second heat exchange device (4), and then flows back to the compression device (1), thereby circulating; Wherein, the heat exchange area of the first heat exchange device (2) is greater than the heat exchange area of the second heat exchange device (4); Wherein, a plurality of the first heat exchange devices (2) are provided, and the plurality of the first heat exchange devices (2) are provided in parallel; Wherein, a plurality of the second heat exchange devices (4) are provided, and the plurality of the second heat exchange devices (4) are arranged in parallel; Wherein, the number of the first heat exchange devices (2) is greater than the number of the second heat exchange devices (4).
2. The heat pump unit according to claim 1, characterized in that: The heat exchange area of the first heat exchange device (2) is 1 to 2 times the heat exchange area of the second heat exchange device (4).
3. The heat pump unit according to claim 1, characterized in that: The first heat exchange device (2) is a condenser.
4. The heat pump unit according to claim 1, characterized in that: The second heat exchange device (4) is an evaporator.
5. The heat pump unit according to claim 1, characterized in that: The throttling device (3) is an expansion valve.
6. The heat pump unit according to claim 1, characterized in that: The heat pump unit further comprises a liquid storage device (5), wherein the liquid storage device (5) is arranged between the first heat exchange device (2) and the throttling device (3), and the first heat exchange device (2), the liquid storage device (5) and the throttling device (3) are sequentially connected.
7. The heat pump unit according to claim 1, characterized in that: The heat pump unit further comprises a gas-liquid separation device (6), wherein the gas-liquid separation device (6) is arranged between the second heat exchange device (4) and the compression device (1), and the second heat exchange device (4), the gas-liquid separation device (6) and the compression device (1) are connected in sequence.