Low-environment-temperature air source heat pump of frost repelling structure

Abstract

The utility model relates to the technical field of air source heat pumps, in particular to a low-environment-temperature air source heat pump with a frost repelling structure, which comprises a heat pump body, a fin type heat exchanger, a compressor, a condenser and an expansion valve are arranged in the heat pump body, and a heating integrated pipe is fixedly arranged on the fin type heat exchanger. The water inlet end and the water outlet end of the heating integrated pipe communicate with the water outlet end and the water inlet end of the condenser correspondingly, and a defrosting assembly is fixedly arranged on the side, facing the middle of the fin type heat exchanger, of the heating integrated pipe. The fin type heat exchanger comprises a plurality of heat exchange pipes which are vertically arranged at equal intervals, and when the heat pump body is in a working state, the defrosting assembly is attached to the heat exchange pipes. According to the fin type heat exchanger, the defrosting assembly is installed on the fin type heat exchanger, when the water storage bag is filled with hot water, the defrosting plate can be extruded to be attached to the wall of the heat exchange pipe, and heating and defrosting of the pipe wall are achieved through the heat conduction function.

Description

Technical Field

[0001] The utility model relates to the technical field of air source heat pumps, in particular to a low ambient temperature air source heat pump with a frost-averse structure. Background Art

[0002] Low ambient temperature air source heat pump uses air as heat source, is driven by electric motor and uses steam compression refrigeration cycle. It is a heat pump water heater or heat pump system that can produce hot water under low ambient temperature conditions. It has been widely used in heating and hot water supply in extremely cold areas of China, not only meeting heating needs, but also achieving the goal of environmental protection and emission reduction.

[0003] Existing low-temperature air source heat pumps are usually composed of a fan, a fin heat exchanger, a compressor, a condenser and an expansion valve; its main operating process is to input electrical energy to drive the fan to do work, allowing air to flow through the fin heat exchanger. The temperature of the refrigerant in the fin heat exchanger is lower than the temperature in the air, so it can absorb the heat in the air through the refrigerant, and then be compressed by the compressor to compress the liquid that absorbs the heat in the air into a high-pressure and high-temperature gas, and then the high-temperature and high-pressure refrigerant is transferred to the water through the condenser to realize the heating process. The refrigerant after cooling and releasing heat evaporates through the expansion valve and absorbs heat again, and finally enters the fin heat exchanger again for circulation heating.

[0004] During this process, because the refrigerant temperature in the fin heat exchanger is lower than the external air temperature, when the air flows through the surface of the fin heat exchanger pipe, it may turn from moisture into frost and deposit on the pipe surface. Since the air source heat pump needs to be used every day, this means that frost will be deposited on the pipe surface every day. If measures are not taken to clean it in time, it may affect the heat exchange effect of the heat exchanger and thus the heating effect of the air source heat pump. To this end, we proposed a low-temperature air source heat pump with a frost-averse structure to effectively solve the above disadvantages. Utility Model Content

[0005] The purpose of the present invention is to provide a low ambient temperature air source heat pump with a frost-resistant structure, so as to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is realized through the following technical solutions: a low-temperature air source heat pump with a frost-averse structure, comprising a heat pump body, wherein a fin heat exchanger, a compressor, a condenser and an expansion valve are arranged in the heat pump body, a heating integrated pipe is fixedly provided on the fin heat exchanger, the water inlet and water outlet of the heating integrated pipe are respectively connected to the water outlet and water inlet of the condenser, and a defrost assembly is fixedly provided on the side of the heating integrated pipe facing the middle of the fin heat exchanger; the fin heat exchanger comprises a plurality of heat exchange tubes arranged vertically at equal intervals, and when the heat pump body is in working condition, the defrost assembly and the heat exchange tube are in contact with each other.

[0007] Optionally, the heating integrated pipe includes a water inlet pipe, a heating pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are fixedly arranged on the left and right sides of the fin heat exchanger respectively, and the heating pipe is horizontally arranged between the water inlet pipe and the water outlet pipe to connect the water inlet pipe and the water outlet pipe. There are several heating pipes, and the heating pipes are arranged one by one corresponding to the gaps between adjacent heat exchange tubes on the fin heat exchanger.

[0008] Optionally, the defrost assembly corresponds one-to-one to the heating tube, and the defrost assembly extends into the gap between two adjacent heat exchange tubes. The defrost assembly includes a water storage bag, one end of the water storage bag is open, and the open end of the water storage bag is connected to the interior of the heating tube; when water is filled in the heating tube, the water storage bag gradually changes from a contracted state to an expanded state.

[0009] Optionally, the defrost assembly also includes two defrost plates, which are symmetrically distributed on both sides of the water storage bag. The defrost plates are a two-section plate structure consisting of a vertical section and a curved section. One end of the vertical section of the defrost plate is hinged on the outer wall of the heating tube, and the curved section of the defrost plate is a structure that is bent toward the fin heat exchanger; when the water storage bag is in an expanded state, the outer surface of the water storage bag and the inner wall of the defrost plate are in contact with each other, and the curved section of the defrost plate and the outer wall of the fin heat exchanger are in close contact with each other.

[0010] Optionally, the defrost assembly further includes a reset rubber band, which is located between the two defrost plates, and the two ends of the reset rubber band are respectively fixedly connected to the two defrost plates; in a natural state, the reset rubber band is in a stretched state.

[0011] Optionally, the water inlet pipe is connected to the water outlet end of the condenser through a first pipe, and the water outlet pipe is connected to the water inlet end of the condenser through a second pipe. Electric valves are provided on the first pipe and the second pipe, and a pressure gauge is also provided on the second pipe.

[0012] Compared with the prior art, the present invention provides a low ambient temperature air source heat pump with a frost-resistant structure, which has the following beneficial effects:

[0013] 1. This utility model installs a defrost assembly on the fin heat exchanger. When the water storage bag is filled with hot water, the defrost plate can be squeezed into a state of contact with the heat exchange tube wall. The heat conduction function is used to heat and defrost the tube wall, avoiding affecting the heat exchange effect of the fin heat exchanger and improving the heating efficiency of the air source heat pump.

[0014] 2. The utility model guides the existing hot water outside into the heating integrated pipe through the hot water pipe, so as to achieve the purpose of providing heat for the defrost component, effectively utilizes the existing conditions, avoids the waste of resources and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the internal operation of the heat pump body of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the heat pump body of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the fin heat exchanger of the utility model;

[0018] Figure 4 This is a front view of the fin heat exchanger of the utility model;

[0019] Figure 5 This is a side sectional view of the defrost assembly of the utility model;

[0020] Figure 6 This is a cross-sectional view of the defrost assembly of the utility model after being filled with water.

[0021] In the figure: 1. Heat pump body; 101. Fin heat exchanger; 1011. Heat exchange tube; 102. Compressor; 103. Condenser; 104. Expansion valve; 2. Heating integrated pipe; 201. Water inlet pipe; 202. Heating pipe; 203. Water outlet pipe; 3. Defrost assembly; 301. Water storage bag; 302. Defrost plate; 303. Reset rubber band; 4. First pipeline; 5. Second pipeline. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 - Figure 6A low-temperature air source heat pump with a frost-resistant structure includes a heat pump body 1. A fin heat exchanger 101, a compressor 102, a condenser 103 and an expansion valve 104 are provided in the heat pump body 1, so that the heat pump body 1 can heat water and provide comfortable hot water for users. The specific process is that through the input of electric energy, the fan is driven to do work, so that air flows through the fin heat exchanger 101. The temperature of the refrigerant in the fin heat exchanger 101 is lower than the temperature in the air, so the refrigerant can absorb the heat in the air. Then, it is compressed by the compressor 102 to compress the liquid that absorbs the heat in the air into a high-pressure and high-temperature gas. Then, the high-temperature and high-pressure refrigerant is transferred to the water through the condenser 103 to realize the heating process. The refrigerant after cooling and releasing heat evaporates and absorbs heat again through the expansion valve 104, and finally enters the fin heat exchanger 101 again for circulation and heating.

[0024] Furthermore, a heating integrated pipe 2 is fixedly provided on the fin heat exchanger 101, and the water inlet and outlet ends of the heating integrated pipe 2 are respectively connected to the water outlet and inlet ends of the condenser 103, so that the hot water in the hot water pipe can flow into the heating integrated pipe 2, thereby realizing the heating effect of the heating integrated pipe 2 on the fin heat exchanger 101.

[0025] A defrost assembly 3 is fixedly provided on one side of the heating integrated pipe 2 toward the middle of the fin heat exchanger 101; the fin heat exchanger 101 includes a plurality of heat exchange tubes 1011 arranged vertically and equidistantly. When the heat pump body 1 is in working condition, the defrost assembly 3 and the heat exchange tube 1011 fit together, so that when the heating integrated pipe 2 is filled with hot water, the heat will be transferred to the defrost assembly 3, and then the defrost assembly 3 will transfer the heat to the heat exchange tube 1011, thereby realizing the function of heating and defrosting, and avoiding affecting the operation of the device.

[0026] The heating integrated pipe 2 is described in detail below:

[0027] The heating integrated pipe 2 includes an inlet pipe 201, a heating pipe 202 and an outlet pipe 203. The inlet pipe 201 and the outlet pipe 203 are respectively fixed vertically on the left and right sides of the fin heat exchanger 101. The heating pipe 202 is horizontally arranged between the inlet pipe 201 and the outlet pipe 203 to connect the inlet pipe 201 and the outlet pipe 203. There are several heating pipes 202, and the heating pipes 202 are arranged one by one corresponding to the gaps between adjacent heat exchange tubes 1011 on the fin heat exchanger 101, so that the heat of the hot water in the heating pipe 202 can enter the gaps between the heat exchange tubes 1011, thereby better heating and defrosting the heat exchange tubes 1011.

[0028] It should be noted that if Figure 1As shown, the water inlet pipe 201 is connected to the water outlet of the condenser 103 through the first pipe 4, and the water outlet pipe 203 is connected to the water inlet of the condenser 103 through the second pipe 5. The hot water heated by the condenser 103 is diverted through the first pipe 4 and flows to the insulated water tank and the heating integrated pipe 2 on the fin heat exchanger 101 respectively, using the existing hot water to achieve heating, saving defrosting costs. At the same time, electric valves are installed on the first pipe 4 and the second pipe 5, and a pressure gauge is also installed on the second pipe 5, so that the staff can control the opening and closing of the first pipe 4 and the second pipe 5 at any time. After the hot water flows through the heating integrated pipe 2 and is cooled, it will flow to the condenser 103 again to be heated, and then be used again, realizing a cycle, which is beneficial to environmental protection.

[0029] In order to enable the hot water in the heating integrated pipe 2 to better heat and defrost the heat exchange tube 1011, the defrost assembly 3 is described in detail below:

[0030] The defrost assembly 3 extends into the gap between two adjacent heat exchange tubes 1011. The defrost assembly 3 includes a water storage bag 301. One end of the water storage bag 301 is open, and the open end of the water storage bag 301 is connected to the interior of the heating tube 202, so that the hot water in the heating tube 202 can flow into the water storage bag 301; when the heating tube 202 is filled with water, the water storage bag 301 gradually changes from a contracted state to an expanded state. The water storage bag 301 can contract and expand so that more hot water can be stored in the water storage bag 301, thereby achieving a better heating and defrosting effect.

[0031] Furthermore, the defrost assembly 3 also includes two defrost plates 302, which are symmetrically distributed on both sides of the water storage bag 301. The defrost plate 302 is a two-section plate structure consisting of a vertical section and a curved section. One end of the vertical section of the defrost plate 302 is hinged on the outer wall of the heating tube 202, and the curved section of the defrost plate 302 is a structure bent toward the fin heat exchanger 101, so that the water storage bag 301 can squeeze the defrost plates 302 on both sides to rotate around the hinge point when it expands, so that the defrost plate 302 is close to the heat exchange tube 1011, thereby better heat conduction. When the water storage bag 301 is in an expanded state, the outer surface of the water storage bag 301 fits against the inner wall of the defrost plate 302, and the curved section of the defrost plate 302 fits closely against the outer wall of the fin heat exchanger 101, so that the defrost plate 302 can transfer the heat of the hot water in the water storage bag 301 to the outer wall of the fin heat exchange tube 1011, thereby achieving the effect of heating and defrosting.

[0032] The defrost assembly 3 also includes a reset rubber band 303, which is located between the two defrost plates 302, and the two ends of the reset rubber band 303 are respectively fixedly connected to the two defrost plates 302; in the natural state, the reset rubber band 303 is in a stretched state, so that when the heat pump body 1 stops working, the two defrost plates 302 will approach each other under the action of the reset rubber band 303, thereby squeezing the water storage bag 301, and then squeezing the water in the water storage bag 301 into the heating pipe 202, and finally flowing into the water outlet pipe 203 to be discharged, thereby preventing cold water from being stored in the water storage bag 301 and affecting the heating efficiency for the next use.

[0033] Furthermore, the defrost plate 302 is made of a metal with good thermal conductivity, such as copper or aluminum alloy, and the reset rubber band 303 is made of an elastic rubber with good heat resistance. In this embodiment, the defrost plate 302 is made of metallic copper and the reset rubber band 303 is made of silicone rubber, so that both the defrost plate 302 and the reset rubber band 303 can function in a high temperature environment.

[0034] The working principle and usage process of the present invention are as follows: First, when the heat pump body 1 is in operation, the valve in the hot water pipe is opened, and the entire heating process is normally operated. After the condenser 103 heats the water to a certain temperature, it is diverted and flows to the insulated water tank and the water inlet pipe 201. The water inlet pipe 201 then guides the water into the heating pipe 202. At this time, the hot water in the heating pipe 202 also flows into the water storage bag 301. When a large amount of hot water is injected into the water storage bag 301, the water storage bag 301 begins to expand, thereby squeezing the defrost plate 302 to both sides. As the water storage bag 301 gradually expands, the curved section of the defrost plate 302 will fit against the side wall of the heat exchange tube 1011. At this time, the heat of the hot water in the water storage bag 301 is transferred to the heat exchange tube 1011 through heat conduction from the defrost plate 302, thereby heating the heat exchange tube 1011, thereby preventing frost on the outer wall of the heat exchange tube 1011 and achieving the heating and defrosting effect.

[0035] It is worth mentioning that in order to make the water storage bag 301 fully expand, the flow rate of the electric valve on the first pipeline 4 can be made greater than the flow rate of the electric valve on the second pipeline 5, thereby increasing the water pressure in the heating concentration pipe 2, so that the water storage bag 301 can be fully expanded, so that the defrost plate 302 and the heat exchange tube 1011 are fully fitted.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low ambient temperature air source heat pump with a frost-resistant structure, comprising a heat pump body (1), wherein a fin heat exchanger (101), a compressor (102), a condenser (103) and an expansion valve (104) are provided in the heat pump body (1), characterized in that: A heating integrated pipe (2) is fixedly provided on the fin heat exchanger (101); the water inlet and water outlet of the heating integrated pipe (2) are respectively connected to the water outlet and water inlet of the condenser (103); a defrost assembly (3) is fixedly provided on one side of the heating integrated pipe (2) facing the middle of the fin heat exchanger (101); the fin heat exchanger (101) comprises a plurality of heat exchange pipes (1011) arranged at equal intervals; when the heat pump body (1) is in an operating state, the defrost assembly (3) and the heat exchange pipes (1011) are in contact with each other.

2. The low ambient temperature air source heat pump with a frost-resistant structure according to claim 1, characterized in that: The heating integrated pipe (2) comprises a water inlet pipe (201), a heating pipe (202) and a water outlet pipe (203); the water inlet pipe (201) and the water outlet pipe (203) are respectively fixedly arranged on the left and right sides of the fin heat exchanger (101); the heating pipe (202) is transversely arranged between the water inlet pipe (201) and the water outlet pipe (203) so that the water inlet pipe (201) and the water outlet pipe (203) are connected; the number of the heating pipes (202) is several, and the heating pipes (202) are arranged one by one corresponding to the gaps between adjacent heat exchange pipes (1011) on the fin heat exchanger (101).

3. The low ambient temperature air source heat pump with a frost-resistant structure according to claim 2, characterized in that: The defrost assembly (3) corresponds to the heating tube (202) one by one, and the defrost assembly (3) extends into the gap between two adjacent heat exchange tubes (1011). The defrost assembly (3) includes a water storage bag (301), one end of the water storage bag (301) is open, and the open end of the water storage bag (301) is connected to the interior of the heating tube (202); when water is filled into the heating tube (202), the water storage bag (301) gradually changes from a contracted state to an expanded state.

4. The low ambient temperature air source heat pump with a frost-resistant structure according to claim 3, characterized in that: The defrost assembly (3) further comprises two defrost plates (302), the two defrost plates (302) being symmetrically distributed on both sides of the water storage bag (301), the defrost plates (302) being a two-section plate structure consisting of a vertical section and a curved section, one end of the vertical section of the defrost plate (302) being hingedly arranged on the outer wall of the heating tube (202), and the curved section of the defrost plate (302) being a structure curved toward the fin heat exchanger (101); when the water storage bag (301) is in an expanded state, the outer surface of the water storage bag (301) and the inner wall of the defrost plate (302) are in contact with each other, and the curved section of the defrost plate (302) and the outer wall of the fin heat exchanger (101) are in close contact with each other.

5. The low ambient temperature air source heat pump with a frost-resistant structure according to claim 4, characterized in that: The defrost assembly (3) further comprises a reset rubber band (303), the reset rubber band (303) being located between the two defrost plates (302), and the two ends of the reset rubber band (303) being fixedly connected to the two defrost plates (302) respectively; in a natural state, the reset rubber band (303) is in a stretched state.

6. The low ambient temperature air source heat pump with a frost-resistant structure according to claim 5, characterized in that: The water inlet pipe (201) is connected to the water outlet end of the condenser (103) via a first pipe (4), and the water outlet pipe (203) is connected to the water inlet end of the condenser (103) via a second pipe (5). Both the first pipe (4) and the second pipe (5) are provided with electric valves, and the second pipe (5) is also provided with a pressure gauge.

Images