Multipurpose heat exchange system

Abstract

The multipurpose heat exchange system comprises a first heat exchanger, a second heat exchanger, a first compressor, a second compressor and a third heat exchanger, wherein the first heat exchanger and the second heat exchanger are installed in a specific space; the first heat exchanger and the second heat exchanger are connected in parallel to two ends of the third heat exchanger; the first heat exchanger and the third heat exchanger are connected through a first compressor and a first valve assembly, and the second heat exchanger and the third heat exchanger are connected through a second compressor and a second valve assembly. The heat exchange requirements of a specific space at different environment medium temperatures can be met through the two heat exchange media.

Description

Technical Field

[0001] The present application relates to a multi-purpose heat exchange system. Background Art

[0002] By applying the reverse Carnot cycle principle, the energy in the air or other energy substances can be converted into the energy required for a specific space. This part of energy can be used for heat exchange with the air or other media in the specific space, thereby increasing or decreasing the temperature in the specific space. Such a specific space can be a house for human habitation or storage of goods, such as using air conditioning or floor heating to heat or cool the house, or a closed space where the temperature of stored food is lower than the ambient temperature, such as using refrigerators to keep food fresh.

[0003] According to the reverse Carnot cycle principle, it is necessary to release energy in a specific space through a heat exchange medium and absorb energy from outside the specific space. Therefore, heat exchangers need to be set up inside and outside the specific space, and there must be a temperature difference between the heat exchange medium in the heat exchanger and the ambient medium inside and outside the specific space to achieve refrigeration and heat exchange. When refrigeration is required in a specific space, the temperature of the heat exchange medium in the specific space must be lower than the temperature of the ambient medium in the specific space, and the temperature of the heat exchange medium outside the specific space must be higher than the temperature of the ambient medium outside the specific space, and vice versa.

[0004] In many areas, heating is required in residential houses in winter, while cooling is required in residential houses in summer. If a single heat exchange medium is used to realize the refrigeration cycle, the operating conditions required by the reverse Carnot cycle principle cannot be met at a specific living location, resulting in extremely low heat exchange efficiency or even ineffective operation. For example, some heat exchange media are suitable for cooling residential houses, but when heating is required, heating cannot be achieved in the house because the temperature of the ambient medium outside the residential house is too low. However, other heat exchange media may have excellent heating performance in low temperature environments, but poor cold absorption in high temperature environments, and cannot achieve cooling in the house. Therefore, if the needs of cooling and heating are to be met at the same time, at least two independent outdoor units need to be set up to meet the needs of cooling and heating respectively, which is bound to increase the occupied space and cost. Utility Model Content

[0005] The purpose of this application is to design a multi-purpose heat exchange system that uses two heat exchange media to meet the heat exchange requirements of a specific space under different ambient medium temperatures. This application can make the outdoor unit structure more compact, effectively reduce material costs, and solve the problem of needing to set up more than two outdoor independent units in the prior art.

[0006] A multi-purpose heat exchange system comprises a first heat exchanger and a second heat exchanger installed inside a specific space, and a first compressor, a second compressor and a third heat exchanger on an outdoor unit installed outside the specific space; the first heat exchanger and the second heat exchanger are connected in parallel to both ends of the third heat exchanger; the first heat exchanger and the third heat exchanger are connected via the first compressor and the first valve assembly, and the second heat exchanger and the third heat exchanger are connected via the second compressor and the second valve assembly.

[0007] Wherein, the first heat exchanger and the second heat exchanger can both be forced convection heat exchangers or natural convection heat exchangers, the first heat exchanger and the second heat exchanger can be combined into one heat exchanger, and the third heat exchanger can be a forced convection heat exchanger or a natural convection heat exchanger; the first valve assembly and the second valve assembly can be combined into one valve assembly, and the specific space and the outdoor unit can be isolated by an isolation layer; the third heat exchanger can be a multi-pipeline parallel heat exchanger, wherein a first heat exchange medium is provided in some of the pipelines, and a second heat exchange medium is provided in another part of the pipeline; an inlet pipe and an outlet pipe are respectively provided at both ends of the pipeline of the first heat exchange medium, and an inlet pipe and an outlet pipe are also respectively provided at both ends of the pipeline of the second heat exchange medium, at least one of the inlet pipe and the outlet pipe of the first heat exchange medium can be provided with a baffle inside, and at least one of the inlet pipe and the outlet pipe of the second heat exchange medium can also be provided with a baffle inside; fins can be provided on the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the first embodiment of the multi-purpose heat exchange system of the present application.

[0009] Figure 2 It is a schematic diagram of a second embodiment of the multi-purpose heat exchange system of the present application.

[0010] Figure 3 It is a schematic diagram of the third embodiment of the multi-purpose heat exchange system of the present application.

[0011] Figure 4 It is a schematic diagram of the fourth embodiment of the multi-purpose heat exchange system of the present application.

[0012] Figure 5 It is a schematic diagram of a heat exchanger of the multi-purpose heat exchange system of the present application.

[0013] Figure 6 It is another schematic diagram of a heat exchanger of the multi-purpose heat exchange system of the present application. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail in conjunction with the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict. Those skilled in the art can understand that the forced convection heat exchange mentioned in the present application refers to a heat exchange method that uses external equipment such as fans to improve the heat exchange efficiency, and natural convection heat exchange refers to a heat exchange method that does not use external equipment but uses natural heat exchange means.

[0015] The multi-purpose heat exchange system of the present application includes a first heat exchanger 11 and a second heat exchanger 12 installed inside a specific space 1, and a first compressor 21, a second compressor 22 and a third heat exchanger 23 installed on an outdoor unit 2 outside the specific space 1. The first heat exchanger 11 and the second heat exchanger 12 are connected in parallel to both ends of the third heat exchanger 23. The first heat exchanger 11 and the third heat exchanger 23 are connected through the first compressor 21 and the first valve assembly 25, and the second heat exchanger 12 and the third heat exchanger 23 are connected through the second compressor 22 and the second valve assembly 26. Figure 1 As shown, a fan motor 24 for forced convection heat exchange can also be provided at the third heat exchanger 23. The components in the outdoor unit 2 can be installed in a housing 27, and a controller 28 for controlling the operation of the components can be installed on the housing 27. The specific space 1 and the outdoor unit 2 are temperature-isolated by an isolation layer 13, and the specific space 1 can be a building or a refrigerator or other equipment. According to the temperature requirements corresponding to the cooling or heating required in the specific space 1, only one of the first heat exchanger 11 and the second heat exchanger 12 is working. That is, when the first heat exchanger 11 exchanges heat with the environmental medium of the specific space 1, the second heat exchanger 12 does not work; vice versa. The first heat exchanger 11 and the second heat exchanger 12 can both adopt forced convection heat exchange or natural convection heat exchange; or one of them can adopt forced convection heat exchange and the other can adopt natural convection heat exchange. In order to further improve the heat exchange efficiency, according to the temperature requirements corresponding to the cooling or heating required in the specific space 1, the heat exchanger with higher heat exchange efficiency is selected for operation. For example, when cooling is required in the specific space 1, a forced convection tube-fin heat exchanger can be used; when heating is required in the specific space 1, a natural convection floor heating heat exchanger can be used. The compressor described in the present application includes a pump.

[0016] When both the first heat exchanger 11 and the second heat exchanger 12 adopt forced convection heat exchange or natural convection heat exchange, the first heat exchanger 11 and the second heat exchanger 12 can be combined into one heat exchanger 112. Figure 2 The heat exchange system adopts forced convection heat exchange. Figure 3The heat exchange system using natural convection heat exchange is shown. When the specific space 1 needs to be cooled, the first heat exchange medium flows out from the first compressor 21 in the outdoor unit 2 and enters the third heat exchanger 23, releasing heat to the environment, which is equivalent to absorbing the cold in the environment. It is throttled and expanded through the first valve assembly 25, and flows into the first heat exchanger 11 to exchange heat with the environment medium of the specific space 1, releasing cold, so that the temperature of the environment medium of the specific space 1 drops, and the purpose of cooling is achieved. At the same time, after the first heat exchange medium obtains heat, it flows into the first compressor 21 again, and refrigeration is repeated. When the specific space 1 needs to be heated, the second heat exchange medium flows from the second compressor 22 in the outdoor unit 2 into the second heat exchanger 12, releasing heat to the environment medium in the specific space 1, so that the temperature of the specific space 1 rises, and at the same time, the cold in the specific space 1 is absorbed, and the second valve assembly 26 is throttled and expanded, and flows into the third heat exchanger 23 to exchange heat with the environment, absorbing heat in the environment, and then further flows into the second compressor 22, and refrigeration is repeated.

[0017] During the above-mentioned cycle, the first heat exchange medium and the second heat exchange medium need to be selected according to the cooling and heating requirements in the specific space 1 and the environmental conditions outside the specific space 1. For example, if heat needs to be absorbed in a cold environment outside the specific space 1, the evaporation temperature of the heat exchange medium must be lower than the ambient temperature to achieve phase change evaporation heat exchange of the heat exchange medium; similarly, if cold air needs to be absorbed in a high-temperature environment outside the specific space 1, the condensation temperature of the refrigeration must be higher than the ambient temperature to achieve phase change condensation heat exchange of the heat exchange medium.

[0018] When valve assemblies are provided on the pipeline through which the first heat exchange medium circulates and the pipeline through which the second heat exchange medium circulates, the first valve assembly 25 and the second valve assembly 26 can be combined into one valve assembly 256, such as Figure 4 As shown. The third heat exchanger 23 of the present application preferably adopts a multi-pipeline parallel heat exchanger, and the parallel multi-pipes can flow into the first heat exchange medium or the second heat exchange medium in a jump-like manner according to the arrangement order of the pipes. For example, assuming that there are 1, 2, 3, ..., 2n parallel pipes 231 on the third heat exchanger in order, wherein the first heat exchange medium flows through the 1st, 3rd, 5th, ..., 2n-1st parallel pipes, and the second heat exchange medium flows through the 2nd, 4th, 6th, ..., 2nth parallel pipes, as shown in FIG. Figure 5As shown. The multiple parallel pipelines through which the first heat exchange medium flows are sealedly connected with the collecting pipe 234 and the collecting pipe 235; and a baffle 236 is set inside at least one of the collecting pipe 234 and the collecting pipe 235 to achieve uniform distribution of the first heat exchange medium in the parallel pipelines and change the flow direction of the first heat exchange medium. The multiple parallel pipelines through which the second heat exchange medium flows are sealedly connected with the collecting pipe 237 and the collecting pipe 238; and a baffle 239 is set inside at least one of the collecting pipe 237 and the collecting pipe 238 to achieve uniform distribution of the second heat exchange medium in the parallel pipelines and change the flow direction of the second heat exchange medium.

[0019] In a preferred embodiment, in order to enhance the heat exchange capacity, fins 232 may be arranged on the parallel pipelines to increase the heat exchange area, thereby increasing the heat exchange amount. Figure 2 The heat exchanger 112 may also be a multi-pipeline parallel heat exchanger. Figure 6 This is a heat exchanger structure when one heat exchanger is used when both the first heat exchanger 11 and the second heat exchanger 12 use natural convection heat exchange. In this structure, since a natural convection heat exchanger is used, a metal film that is also used to increase the heat exchange area can be used.

[0020] Although the implementation methods disclosed in this application are as above, the contents described are only implementation methods adopted for facilitating the understanding of this application, and are not intended to limit this application. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. A multi-purpose heat exchange system, characterized in that: It includes a first heat exchanger and a second heat exchanger installed inside the space, and a first compressor, a second compressor and a third heat exchanger on an outdoor unit installed outside the space; the first heat exchanger and the second heat exchanger are connected in parallel to both ends of the third heat exchanger; the first heat exchanger and the third heat exchanger are connected through the first compressor and the first valve assembly, and the second heat exchanger and the third heat exchanger are connected through the second compressor and the second valve assembly.

2. The multi-purpose heat exchange system according to claim 1, characterized in that: The first heat exchanger and the second heat exchanger are both forced convection heat exchangers or natural convection heat exchangers, and the first heat exchanger and the second heat exchanger are combined into one heat exchanger.

3. The multi-purpose heat exchange system according to claim 1 or 2, characterized in that: The third heat exchanger is a forced convection heat exchanger or a natural convection heat exchanger.

4. The multi-purpose heat exchange system according to claim 1 or 2, characterized in that: The first valve assembly and the second valve assembly are combined into one valve assembly.

5. The multi-purpose heat exchange system according to claim 1 or 2, characterized in that: The space and the outdoor unit are isolated by an isolation layer.

6. The multi-purpose heat exchange system according to claim 1 or 2, characterized in that: The third heat exchanger is a multi-pipeline parallel heat exchanger, in which the first heat exchange medium is arranged in some of the pipes, and the second heat exchange medium is arranged in another part of the pipes.

7. The multi-purpose heat exchange system according to claim 6, characterized in that: Both ends of the pipeline of the first heat exchange medium are respectively provided with an inlet collecting pipe and an outlet collecting pipe, and both ends of the pipeline of the second heat exchange medium are also respectively provided with an inlet collecting pipe and an outlet collecting pipe.

8. The multi-purpose heat exchange system according to claim 7, characterized in that: At least one of the inlet and outlet collecting pipes of the first heat exchange medium is provided with a baffle plate.

9. The multi-purpose heat exchange system according to claim 7, characterized in that: At least one of the inlet and outlet collecting pipes of the second heat exchange medium is provided with a baffle plate.

10. The multi-purpose heat exchange system according to claim 6, characterized in that: The pipeline is provided with fins.

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