Refrigerating unit heat energy recycling system and refrigerating machine

Abstract

The utility model discloses a heat energy recycling system of a refrigerating unit, which relates to the technical field of energy conservation and comprises a first heat exchanger, a compressor, a four-way valve, a hot water heat exchanger, a hot water heat exchanger, a hot water heat exchanger and a hot water heat exchanger. The hot water heat exchanger is respectively provided with a refrigerant inlet pipeline and a refrigerant outlet pipeline, the refrigerant inlet pipeline is communicated with the four-way valve, the second heat exchanger is communicated with the four-way valve, and a branch is arranged between the second heat exchanger and the hot water heat exchanger and is communicated with the refrigerant inlet pipeline; an outlet of the second heat exchanger is communicated with the first heat exchanger after being combined with a refrigerant outlet pipeline, the control valve assembly is used for controlling the flow direction and flow of a refrigerant in the pipeline, continuous supply of hot water is achieved by controlling the flow directions of refrigerating media in different states, and the use requirements of users are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving technical field more specifically, relate to a refrigerating unit heat energy recycling system. BACKGROUND

[0002] With people's increasing demand for food safety and food quality, the application of food cold chain is increasingly common.

[0003] The refrigerating unit uses the characteristics of all -year refrigeration, and the condensing heat can be recycled all the year round, and in the application place such as catering, canteen, the condensing heat recovery is recovered to prepare kitchen, domestic hot water, can provide the applicable hot water of user, realizes the effective recycling of energy, reduces the energy cost of user simultaneously, but the heat energy recycling system of the condensing heat recovery preparation hot water of present uses is unstable, leads to the poor hot water supply effect, cannot satisfy the use demand.

[0004] Summarized above, how provides a kind of heat energy recycling system for preparing hot water using heat energy recycling, it is the urgent problem of present field technical personnel to be solved. Utility model content

[0005] Therefore, the utility model aims at providing a refrigerating unit heat energy recycling system, which can realize stable heat energy recycling to reduce the expenditure of user's energy cost.

[0006] Another object of the utility model is to provide a refrigerating machine comprising the refrigerating unit heat energy recycling system.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A refrigerating unit heat energy recycling system, comprising a first heat exchanger and a compressor, further comprising:

[0009] A four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the exhaust port of the compressor is communicated with the first valve port of the four-way valve, the suction port of the compressor is communicated with the fourth valve port of the four-way valve, and the first heat exchanger is communicated with the second valve port of the four-way valve;

[0010] A hot water heat exchanger is provided with a refrigerant inlet pipe and a refrigerant outlet pipe, and the refrigerant inlet pipe is communicated with the third valve port of the four-way valve.

[0011] A second heat exchanger is communicated with the second valve port or the third valve port of the four-way valve, a branch is arranged between the second heat exchanger and the hot water heat exchanger, and the second heat exchanger is communicated with the refrigerant inlet pipeline; the outlet of the second heat exchanger is merged with the refrigerant outlet pipeline and then communicated with the first heat exchanger;

[0012] A control valve assembly is used for controlling the flow direction and flow rate of the refrigerant in the pipeline.

[0013] The control valve assembly further comprises:

[0014] A first throttling valve and a second throttling valve, the first throttling valve is used for controlling the flow rate of the pipeline between the second heat exchanger and the first heat exchanger, and the second throttling valve is used for controlling the flow rate of the first heat exchanger inlet.

[0015] A first control valve is used for controlling the flow rate of the hot water heat exchanger outlet.

[0016] The control valve assembly further comprises:

[0017] A three-way valve is used for controlling the flow rate of the branch and the second heat exchanger inlet.

[0018] The control valve assembly further comprises:

[0019] A second control valve is arranged between the second heat exchanger and the four-way valve and is used for controlling the flow rate of the pipeline between the four-way valve and the second heat exchanger.

[0020] A third control valve is arranged in the branch and is used for controlling the flow rate of the branch.

[0021] The first control valve and the second control valve are electronic expansion valves, and the third control valve is an electric ball valve.

[0022] The control valve assembly further comprises:

[0023] A liquid injection pipeline is communicated with the pipeline merged with the second heat exchanger and the refrigerant outlet pipeline at one end, and the other end of the liquid injection pipeline is used for cooling the compressor.

[0024] The control valve assembly further comprises:

[0025] A third throttling valve is used for controlling the liquid injection pipeline.

[0026] The hot water heat exchanger is a plate heat exchanger or a tube heat exchanger.

[0027] Further, the compressor exhaust port and the four-way valve are provided with a one-way valve.

[0028] The refrigerating unit heat energy recycling system provided by the utility model, when in use, the exhaust port and the suction port of the compressor are communicated with the four-way valve, the first heat exchanger is communicated with the four-way valve, the hot water heat exchanger is respectively provided with a refrigerant inlet pipeline and a refrigerant outlet pipeline, the refrigerant inlet pipeline is communicated with the four-way valve, so that the high-pressure and high-temperature refrigerant medium compressed by the compressor flows to the hot water heat exchanger through the four-way valve, the temperature of the refrigerant medium is absorbed through the hot water heat exchanger, and the hot water is prepared, the second heat exchanger is communicated with the four-way valve, a branch is arranged between the second heat exchanger and the four-way valve, and the branch is communicated with the refrigerant inlet pipeline, the outlet of the second heat exchanger is communicated with the first heat exchanger after being combined with the refrigerant outlet pipeline, and the control valve assembly is used for controlling the flow direction and flow of the pipeline, the flow direction and flow of the pipeline are controlled through a plurality of control valves, so that the refrigerant medium in different states enters the hot water heat exchanger, the supply of hot water is realized, and the use demand of the user is met.

[0029] The utility model provides a kind of refrigerating machine, including the refrigerating unit heat energy recycling system described above. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0031] Figure 1 It is the structure schematic view of mode one provided by the utility model;

[0032] Figure 2 It is the structure schematic view of mode two provided by the utility model;

[0033] Figure 3 It is the structure schematic view of mode three provided by the utility model;

[0034] Figure 4 It is the structure schematic view of mode four provided by the utility model;

[0035] Figures 1-4 In the drawings, reference signs include:

[0036] Compressor 1, second heat exchanger 2, four-way valve 3, second valve port 301, first valve port 302, fourth valve port 303, third valve port 304, hot water heat exchanger 4, refrigerant outlet pipeline 5, refrigerant inlet pipeline 6, first heat exchanger 7, control valve assembly 8, second control valve 801, first throttle valve 802, third control valve 803, first control valve 804, third throttle valve 805, second throttle valve 806, branch 9, liquid injection pipeline 10. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0038] The core of the utility model is to provide a refrigerating unit heat energy recycling system, which can realize stable heat energy recycling to reduce the expenditure of user energy cost.

[0039] Another core of the utility model is to provide a refrigerating machine comprising the above refrigerating unit heat energy recycling system.

[0040] Please refer to Figures 1-4 A refrigerating unit heat energy recycling system, comprising a first heat exchanger 7, a compressor 1, a four-way valve 3, a hot water heat exchanger 4, a second heat exchanger 2 and a control valve assembly 8, the four-way valve is provided with a first valve port 302, a second valve port 301, a third valve port 304 and a fourth valve port 303, the exhaust port of the compressor 1 is communicated with the first valve port 302 of the four-way valve 3, the suction port of the compressor 1 is communicated with the fourth valve port 303 of the four-way valve 3, the first heat exchanger 7 is communicated with the second valve port 301 of the four-way valve 3, the hot water heat exchanger 4 is respectively provided with a refrigerant inlet pipeline 6 and a refrigerant outlet pipeline 5, the refrigerant inlet pipeline 6 is communicated with the four-way valve 3, the second heat exchanger 2 is communicated with the second valve port 301 or the third valve port 304 of the four-way valve 3, a branch 9 is arranged between the second heat exchanger 2 and the fourth valve port 303 of the four-way valve 3, and the branch 9 is communicated with the refrigerant inlet pipeline 6, the outlet of the second heat exchanger 2 is communicated with the first heat exchanger 7 after being combined with the refrigerant outlet pipeline 5, and the control valve assembly 8 is used for controlling the flow direction and flow of pipeline fluid.

[0041] In use, the discharge port and the suction port of the compressor 1 are communicated with the four-way valve 3, the first heat exchanger 7 is communicated with the four-way valve 3, the hot water heat exchanger 4 is respectively provided with a refrigerant inlet pipeline 6 and a refrigerant outlet pipeline 5, the refrigerant inlet pipeline 6 is communicated with the four-way valve 3, so that the high-pressure and high-temperature refrigerant compressed by the compressor 1 flows to the hot water heat exchanger 4 through the four-way valve 3, the temperature of the refrigerant is absorbed by the hot water heat exchanger 4, and the hot water is prepared, the second heat exchanger 2 is communicated with the four-way valve 3, a branch 9 is arranged between the second heat exchanger 2 and the four-way valve 3, and the second heat exchanger 2 is communicated with the refrigerant inlet pipeline 6, the outlet of the second heat exchanger 2 is communicated with the refrigerant outlet pipeline 5, and then the outlet is communicated with the first heat exchanger 7, and the control valve assembly 8 is used for controlling the flow direction and flow of the pipeline, the flow direction and flow of the pipeline are controlled through a plurality of control valves, so that the refrigerant in different states enters the hot water heat exchanger, the supply of hot water is realized, and the use demand of the user is met.

[0042] It should be noted that the four-way valve 3 in the embodiment of the utility model is selected as an electromagnetic four-way valve 3.

[0043] In addition, the first valve port 302 of the four-way valve 3 is an inlet, and the other three valve ports are outlets.

[0044] Please refer to Figures 1-4 In some embodiments, the control valve assembly 8 comprises a first throttling valve 802 and a second throttling valve 806, the first throttling valve 802 is used for controlling the outlet flow of the second heat exchanger 2, and the second throttling valve 806 is used for controlling the inlet flow of the first heat exchanger 7, that is, the second throttling valve 806 controls the inlet flow of the first heat exchanger 7 to achieve the purpose of throttling and pressure reduction, so that the refrigerant after pressure reduction enters the first heat exchanger 7 and is sucked into the suction port of the compressor 1 after heat exchange in a high-temperature and low-pressure state.

[0045] It should be noted that the first throttling valve 802 and the second throttling valve 806 in the embodiment of the utility model are both electrically controlled.

[0046] Optionally, in some embodiments, the control valve assembly 8 further comprises a three-way valve, the three-way valve is arranged between the four-way valve 3, the second heat exchanger 2 and the hot water heat exchanger 4, and the three-way valve is used for controlling the flow of the branch 9 and the inlet of the second heat exchanger 2, so that the three-way valve controls the flow of the branch 9 and the inlet of the second heat exchanger 2, which is beneficial to reducing the number of valves and reducing the cost.

[0047] In other embodiments, a pipeline flow divider can be used instead of the three-way valve to control the flow of the branch 9 and the inlet of the second heat exchanger 2.

[0048] In other embodiments, a four-way valve, i.e. a valve with more ports, can be used instead of the three-way valve, which can ensure effective control of the flow rate between the control branch 9 and the inlet of the second heat exchanger 2.

[0049] In other embodiments, the control valve assembly 8 further comprises a second control valve 801 and a third control valve 803, the second control valve 801 being used to control the flow rate between the four-way valve 3 and the second heat exchanger 2, and the third control valve 803 being used to control the flow rate of the branch 9, i.e. the three-way valve in the above embodiments is replaced by the combination of the second control valve 801 and the third control valve 803, which can improve the control accuracy of the flow rate of the pipeline.

[0050] Optionally, in some embodiments, the first control valve 804 and the second control valve 801 are electronic expansion valves, and the third control valve 803 is an electric ball valve.

[0051] Please refer to Figures 1-4 In order to further improve the cooling effect of the compressor 1 during use, in some embodiments, a liquid injection pipeline 10 is further included, one end of the liquid injection pipeline 10 being in communication with the pipeline after the outlet of the second heat exchanger 2 and the outlet pipeline 5 of the refrigerant are combined, and the other end of the liquid injection pipeline 10 being used for cooling the compressor 1, i.e. a nozzle is installed at the end of the liquid injection pipeline 10, and the compressor 1 is cooled through the nozzle, which can improve the working efficiency of the compressor 1, and the liquid injection pipeline 10 is in communication with the pipeline after the outlet of the second heat exchanger 2 and the outlet pipeline 5 of the refrigerant are combined, so that the liquid refrigerant after cooling is always used as the cooling source, which can further improve the cooling effect and efficiency of the compressor 1.

[0052] Please refer to Figures 1-4 In some embodiments, the control valve assembly 8 further comprises a third throttling valve 805, which is used to control the flow rate of the liquid injection pipeline 10.

[0053] Optionally, in some embodiments, the hot water heat exchanger 4 is a plate heat exchanger or a tube heat exchanger.

[0054] Optionally, in some embodiments, a one-way valve is arranged between the exhaust port of the compressor 1 and the four-way valve 3.

[0055] In the above embodiments, the heat energy recycling system has four modes:

[0056] Please refer to Figure 1In mode one, four-way valve 3 is not powered, this mode is refrigeration mode, second control valve 801 is closed, first control valve 804 is opened, third control valve 803 is opened according to demand, second throttle valve 806 is opened, first throttle valve 802 is throttled to reduce pressure, high-temperature and high-pressure refrigerant after compression of compressor 1 passes through four-way valve 3, part of which enters hot water heat exchanger 4 to prepare hot water, and the other part enters second heat exchanger 2 through branch 9, the opening of third control valve 803 depends on the hot water usage, when the hot water usage is sufficient, the opening of third control valve 803 is increased.

[0057] In summer, the ambient temperature is about 30℃, the refrigeration demand is large, and the refrigeration unit is in refrigeration mode for a long time, so the amount of high-temperature and high-pressure refrigerant generated by compressor 1 is large, so when the hot water usage is sufficient, it is divided into second heat exchanger 2 to ensure the normal operation of the refrigeration unit, and the refrigeration unit operates in the above mode 1 in this environment, that is, it can stably provide hot water.

[0058] Please refer to Figure 2 In mode two, four-way valve 3 is not powered, second control valve 801 is opened, first control valve 804 is opened, third control valve 803 is closed, second throttle valve 806 is throttled to reduce pressure, and first throttle valve 802 is throttled to reduce pressure, this mode is refrigeration mode, at this time, high-temperature and high-pressure refrigerant after compression of compressor 1 passes through four-way valve 3 and enters hot water heat exchanger 4, and the heat is used to generate hot water, after heat exchange, part of the refrigerant passes through second throttle valve 806 into first heat exchanger 7, and the other part passes through first throttle valve 802 into second heat exchanger 2, the refrigerant entering first heat exchanger 7 and second heat exchanger 2 flows to four-way valve 3 and merges before entering four-way valve 3, and then enters the suction port of compressor 1 through four-way valve 3.

[0059] In autumn, the ambient temperature is about 10℃, the refrigeration demand decreases, and the hot water demand increases, so the heat is used to generate hot water, and the refrigerant after heat exchange is used as the cold source of the suction port of compressor 1 after heat exchange in first heat exchanger 7 and second heat exchanger 2, in this environment, the unit operates in mode 2, which helps to improve the hot water supply capacity and ensures the stable supply of hot water.

[0060] Please refer to Figure 3 In mode three, four-way valve 3 is not powered, second control valve 801 is opened, first control valve 804 is opened, third control valve 803 is closed, first throttle valve 802 is throttled to reduce pressure, and second throttle valve 806 is closed, in this mode, no refrigeration is performed, at this time, high-temperature and high-pressure refrigerant after compression of compressor 1 passes through four-way valve 3 and enters hot water heat exchanger 4, and the heat is used to generate hot water, after heat exchange, the refrigerant enters second heat exchanger 2 through first throttle valve 802, and then enters four-way valve 3 through control valve 801, and finally enters compressor 1 through the suction port.

[0061] In winter, the ambient temperature is less than 0 DEG C, the freezing demand is further reduced, and the freezing operation time is short, so the unit operates in mode 2 when refrigeration is required, and the unit can operate in mode 3 to continue to provide hot water when there is no freezing demand, so that the continuous supply of hot water is realized.

[0062] The three modes are realized by controlling the opening and closing of the valves, and the control of the valves is realized by the logic algorithm built in the unit, so that different operation modes of the unit in different modes are met, the purpose of continuously supplying hot water for the user is achieved, the use demand of the user is met, the heat energy of the freezing unit is fully utilized, the waste of energy is reduced, and the resource use cost of the user is reduced.

[0063] Please refer to Figure 4 In mode four, the four-way valve 3 is powered on, the second control valve 801 is closed, the first control valve 804 is closed, the third control valve 803 is opened, the second throttle valve 806 is throttled and reduced in pressure, and the first throttle valve 802 is opened. This mode is a defrosting mode, the high-temperature and high-pressure refrigerant compressed by the compressor 1 only enters the first heat exchanger 7 after passing through the four-way valve 3, and the heat is all used for defrosting of the first heat exchanger 7, then is evaporated in the second heat exchanger 2 after throttling through the second throttle valve 806, and returns to the suction port of the compressor 1 through the four-way valve 3.

[0064] In the above mode, if the defrosting speed is too low due to the too low outdoor environment temperature, in order to further improve the defrosting efficiency of the first heat exchanger 7, the first control valve 804 can be appropriately opened, and the first throttle valve 802 is throttled, so that part of the refrigerant after defrosting and cooling enters the hot water heat exchanger 4 to absorb part of the heat of the hot water, so as to improve the temperature of the refrigerant at the suction port of the compressor 1, thereby optimizing the defrosting effect.

[0065] That is, the embodiment of the utility model focuses on: the hot water heat exchanger 4 is used for absorbing the temperature of the refrigerant and preparing hot water, the second heat exchanger 2 is communicated with the four-way valve 3, a branch 9 is arranged between the communication between the second heat exchanger 2 and the four-way valve 3 and is communicated with the refrigerant inlet pipeline 6, the outlet of the second heat exchanger 2 is confluent with the refrigerant outlet pipeline 5 and is communicated with the first heat exchanger 7, and the control valve assembly 8 is used for controlling the flow direction and flow of the pipeline fluid. The flow direction and flow of the pipeline are controlled through a plurality of control valves, so that the refrigerant in different states enters the hot water heat exchanger, the supply of hot water is realized, and the use demand of the user is met.

[0066] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.

[0067] The above has carried out the detailed introduction to the refrigerating unit heat energy recycling system provided by the utility model. The principle and implementation mode of the utility model are described by applying specific examples in this paper, and the above embodiment description is only used for helping to understand the method and core idea of the utility model. It should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A refrigeration unit heat energy recovery system comprising a first heat exchanger (7) and a compressor (1), characterized in that, Also comprising: A four-way valve (3) provided with a first valve port (302), a second valve port (301), a third valve port (304) and a fourth valve port (303), the exhaust port of the compressor (1) is communicated with the first valve port (302) of the four-way valve (3), the suction port of the compressor (1) is communicated with the fourth valve port (303) of the four-way valve (3), the first heat exchanger (7) is communicated with the second valve port (301) of the four-way valve (3); A hot water heat exchanger (4) provided with a refrigerant inlet pipe (6) and a refrigerant outlet pipe (5), the refrigerant inlet pipe (6) is communicated with the third valve port (304) of the four-way valve (3); A second heat exchanger (2) communicated with the second valve port (301) or the third valve port (304) of the four-way valve (3), a branch (9) is provided between the second heat exchanger (2) and the hot water heat exchanger (4), and the second heat exchanger (2) is communicated with the refrigerant inlet pipe (6), the outlet of the second heat exchanger (2) is communicated with the first heat exchanger (7) after being merged with the refrigerant outlet pipe (5); A control valve assembly (8) for controlling the flow direction and flow rate of the refrigerant in the pipeline.

2. A chiller unit heat energy recovery system according to claim 1, wherein, The control valve assembly (8) comprises: A first throttle valve (802) and a second throttle valve (806), the first throttle valve (802) is used for controlling the flow rate of the pipeline between the second heat exchanger (2) and the first heat exchanger (7), and the second throttle valve (806) is used for controlling the flow rate of the inlet of the first heat exchanger (7); A first control valve (804) for controlling the flow rate of the outlet of the hot water heat exchanger (4).

3. A chiller unit heat recovery system as claimed in claim 2, wherein, The control valve assembly (8) further comprises: A three-way valve for controlling the flow rate of the branch (9) and the inlet of the second heat exchanger (2).

4. A chiller unit heat recovery system according to claim 3, wherein, The control valve assembly (8) further comprises: A second control valve (801) provided between the second heat exchanger (2) and the four-way valve (3) and used for controlling the flow rate of the pipeline between the four-way valve (3) and the second heat exchanger (2); A third control valve (803) provided in the branch (9) and used for controlling the flow rate of the branch (9).

5. A chiller unit heat recovery system as set forth in claim 4 wherein, The first control valve (804) and the second control valve (801) are electronic expansion valves, and the third control valve (803) is an electric ball valve.

6. A chiller unit heat energy recovery system according to claim 5, wherein, Also comprising: A liquid injection pipeline (10) communicated with the pipeline after the second heat exchanger (2) and the refrigerant outlet pipe (5) are merged, and the other end of the liquid injection pipeline (10) is used for cooling the compressor (1).

7. A chiller unit heat recovery system according to claim 6 wherein, The control valve assembly (8) further comprises: A third throttle valve (805) for controlling the flow rate of the liquid injection pipeline (10).

8. A chiller unit heat recovery system according to any one of claims 1-7, wherein, The hot water heat exchanger (4) is a plate heat exchanger or a tube heat exchanger.

9. A chiller unit heat recovery system according to any one of claims 1-7, wherein, A one-way valve is provided between the exhaust port of the compressor (1) and the four-way valve (3).

10. A refrigerator characterized by comprising: A refrigeration unit heat energy recovery system comprising the system of any of claims 1-9.

Images