Throttling device and tableware treatment device

Abstract

A throttling device and a tableware treatment device. The throttling device is arranged between two heat exchangers and comprises a plurality of throttling assemblies. Each throttling assembly comprises a throttling valve and a control valve connected in series to the throttling valve, wherein the throttling valves of the plurality of throttling assemblies are connected in series, and the control valve of at least one of the throttling assemblies is connected in parallel to at least one of the other throttling assemblies. The tableware treatment device comprises: a housing having an accommodating cavity, and an air outlet, an air return opening, a water outlet and a water return opening that are in communication with the accommodating cavity, the accommodating cavity being used for accommodating tableware; an air return channel, a fan, a first heat exchanger and a second heat exchanger, the air return channel being in communication with the air outlet and the air return opening, and the fan, the first heat exchanger and the second heat exchanger being all arranged in the air return channel, with the first heat exchanger being arranged close to the air outlet and the second heat exchanger being arranged close to the air return opening; a heat-pump channel, a circulating pump and a third heat exchanger, the heat-pump channel being in communication with the water outlet and the water return opening, and the circulating pump and the third heat exchanger being arranged in the heat-pump channel; a compressor having an outlet connected to the first heat exchanger and the third heat exchanger, and an inlet connected to the second heat exchanger or the first heat exchanger; and the throttling device arranged between any two of the first heat exchanger, the second heat exchanger and the third heat exchanger.

Description

Throttling device and tableware processing device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202311751240.0 filed on December 29, 2023, and No. 202323466465.X, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of electrical equipment, and in particular to a throttling device and a tableware processing device. Background Art

[0004] The tableware processing device is an intelligent household appliance that replaces manual tableware processing and is currently widely used. During the tableware washing process, washing water needs to be transported to each rotating spray arm through a circulation pump to continuously spray the washing dishes, thereby achieving the purpose of washing the dishes. In order to further shorten the washing time of the tableware processing device, the washing system of the existing tableware processing device will use an electric heater to increase the temperature of the washing water. When the washing water is circulated and sprayed on the tableware, the high-temperature washing water will wash away the contaminants on the tableware and bring heat to the tableware, so that the tableware processing device can achieve a higher cleaning rate and drying rate in a shorter washing time. Because during the working cycle, the heating energy consumption of the washing water accounts for more than 80% of the energy consumption of the entire tableware processing device. Therefore, reducing the heating energy consumption of the washing water is a key technical direction for reducing the energy consumption of the tableware processing device.

[0005] A throttling device is required in both the drying process and the heat pump process of a dishware processing device. The throttling device can change the state of the heat exchange medium to promote its circulation. Currently, throttling devices in related technologies are separate throttling components, resulting in poor throttling effects and prone to heat waste.

[0006] Summary of the Invention

[0007] The present disclosure aims to at least to some extent solve the technical problem of poor throttling effect. To this end, the present disclosure provides a throttling device and a tableware processing device.

[0008] According to a first aspect of the present disclosure, a throttling device is provided, disposed between two heat exchangers. The throttling device comprises: a plurality of throttling assemblies, each comprising a throttling valve and a control valve connected in series with the throttling valve. The control valve of at least one of the throttling assemblies is connected in parallel with at least one of the other throttling assemblies.

[0009] Each throttling assembly includes a throttle valve and a control valve connected in series therewith. If the control valve of at least one of the throttle assemblies is connected in parallel with at least one of the other throttle assemblies, it means that the control valve of one of the throttle assemblies is connected in parallel with the other throttle assembly. If the control valve is opened, the other throttle assembly is short-circuited, and only the throttle valve corresponding to the control valve can be turned on. If the control valve is closed and the control valve of the throttle assembly connected in parallel with it is opened, the two throttle valves can be turned on. It can be seen that multiple control valves can be coordinated to turn on different numbers of throttle valves to obtain different flow rates. That is, by coordinating different control valves, the number of throttle valves can be adjusted, thereby adjusting the flow rate. Therefore, there is no need to set throttle valves with different flow rates, which can reduce the cost of variable flow.

[0010] In some embodiments, the plurality of throttle assemblies includes a first throttle assembly and a second throttle assembly.

[0011] In some embodiments, the first throttle assembly includes a first throttle valve and a first control valve.

[0012] In some embodiments, the second throttle assembly includes a second throttle valve and a second control valve.

[0013] In some embodiments, the first control valve is connected in series with the first throttle valve.

[0014] In some embodiments, the second control valve is connected in series with the second throttle valve.

[0015] In some embodiments, the second control valve is connected in parallel with the first throttle valve and the first control valve.

[0016] In some embodiments, the first control valve, the first throttle valve, and the second throttle valve are connected in sequence.

[0017] In some embodiments, a first connection point is defined between the first throttle valve and the second throttle valve, and one end of the second control valve is connected to the first connection point.

[0018] In some embodiments, one end of the second control valve away from the first connection point is connected to a section of the first control valve away from the first throttle valve to form an input point; and one end of the second throttle valve away from the first throttle valve forms an output point.

[0019] In some embodiments, the first throttle valve is connected in series with the second throttle valve.

[0020] In a second aspect, an embodiment of the present disclosure provides a tableware processing device, comprising: a shell having a accommodating cavity, an air outlet, a return air outlet, a water outlet and a return water outlet connected to the accommodating cavity, the accommodating cavity being used to accommodate tableware; a return air channel, a fan, a first heat exchanger, and a second heat exchanger, the return air channel being connected to the air outlet and the return air outlet, the fan, the first heat exchanger and the second heat exchanger being all arranged in the return air channel, the first heat exchanger being arranged close to the air outlet, and the second heat exchanger being arranged close to the return air outlet; a heat pump channel, a circulating pump and a third heat exchanger, the heat pump channel being connected to the water outlet and the return water outlet, and the circulating pump and the third heat exchanger being arranged in the heat pump channel; and a compressor, the outlet of the compressor being connected to the first heat exchanger and the third heat exchanger, and the inlet of the compressor being connected to the second heat exchanger or the first heat exchanger.

[0021] The throttling device provided in the first aspect is arranged between any two of the first heat exchanger, the second heat exchanger and the third heat exchanger.

[0022] The tableware processing device provided in the second aspect has the same beneficial effects as the throttling device provided in the first aspect, and will not be described in detail here.

[0023] In some embodiments, the throttling device is disposed between the first heat exchanger and the second heat exchanger.

[0024] In some embodiments, an input point of the throttling device is connected to the first heat exchanger.

[0025] In some embodiments, the input point of the throttling device is connected to the second heat exchanger.

[0026] In some embodiments, the throttling device is disposed between the third heat exchanger and the first heat exchanger or the second heat exchanger.

[0027] In some embodiments, an input point of the throttling device is connected to the third heat exchanger.

[0028] In some embodiments, an output point of the throttling device is connected to the first heat exchanger or the second heat exchanger.

[0029] In some embodiments, the air outlet and the air return outlet are arranged on the same side of the housing.

[0030] In some embodiments, the return air duct is provided with an air inlet and an air outlet.

[0031] In some embodiments, the air inlet is disposed between the first heat exchanger and the air outlet.

[0032] In some embodiments, the exhaust port is disposed between the second heat exchanger and the return air port.

[0033] In some embodiments, when the circulation pump is started, the air inlet and the air outlet are opened, and the air outlet and the return air outlet are closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0035] FIG1 shows a schematic structural diagram of a first throttling device of a tableware processing device according to some embodiments of the present disclosure.

[0036] FIG2 shows another structural schematic diagram of the first throttling device of the tableware processing device according to other embodiments of the present disclosure.

[0037] FIG3 shows a schematic structural diagram of a dishware processing device in a drying mode according to some embodiments of the present disclosure.

[0038] FIG4 shows a schematic structural diagram of the second heat exchanger serving as an evaporator when the dishware processing apparatus is in a heat pump mode according to some embodiments of the present disclosure.

[0039] FIG5 shows a schematic structural diagram of a first heat exchanger serving as an evaporator when the dishware processing apparatus is in a heat pump mode according to some embodiments of the present disclosure.

[0040] Reference numerals: 100, tableware processing device; 110, housing; 112, accommodating chamber; 113, air outlet; 114, air return outlet; 115, water outlet; 116, water return outlet;

[0041] 120, return air duct; 121, air inlet; 123, air outlet; 125, first air valve; 126, second air valve;

[0042] 132. Fan; 134. First heat exchanger; 136. Second heat exchanger;

[0043] 140, throttling device; 141, throttling assembly; 141a, throttle valve; 141b, control valve;

[0044] 142, first throttle assembly; 142a, first throttle valve; 142b, first control valve; 143, second throttle assembly; 143a, second throttle valve; 143b, second control valve; 145, third throttle assembly; 145a, third throttle valve; 145b, third control valve; 146a, first connection point; 146b, input point; 146c, output point;

[0045] 150, heat pump channel; 152, circulation pump; 154, third heat exchanger; 160, compressor; 162, inlet; 164, outlet; 172, first reversing valve; 174, second reversing valve. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0047] It should be noted that all directional indications in the embodiments of the present disclosure are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0048] In this disclosure, unless otherwise expressly specified or limited, the terms "connect," "fix," etc. should be understood in a broad sense. For example, "fix" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements, unless otherwise expressly specified. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0049] In addition, in the present disclosure, descriptions such as "first" and "second" are for descriptive purposes only and cannot be understood as indicating or implying their 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 at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present disclosure.

[0050] The tableware processing device is an intelligent household appliance that replaces manual tableware processing and is currently widely used. During the tableware washing process, washing water needs to be transported to each rotating spray arm through a circulation pump to continuously spray the washing dishes, thereby achieving the purpose of washing the dishes. In order to further shorten the washing time of the tableware processing device, the existing tableware processing device washing system will use an electric heater to increase the temperature of the washing water. When the washing water is circulated and sprayed on the tableware, the high-temperature washing water will wash away the contaminants on the tableware and bring heat to the tableware, so that the tableware processing device can achieve a higher cleaning rate and drying rate in a shorter washing time. Because during the working cycle, the heating energy consumption of the washing water accounts for more than 80% of the energy consumption of the entire tableware processing device. Therefore, reducing the heating energy consumption of the washing water is a key technical direction for reducing the energy consumption of the tableware processing device.

[0051] A throttling device is required in both the drying process and the heat pump process of the dishware processing device. The throttling device can change the state of the heat exchange medium to promote the circulation of the heat exchange medium. However, the throttling devices in the current related technologies are all separate throttling components, resulting in poor throttling effects and prone to heat source waste. The throttling devices and dishware processing devices according to some embodiments of the present disclosure can improve the above problems. The throttling devices and dishware processing devices according to some embodiments of the present disclosure can achieve variable flow resistance under different working conditions, thereby improving the efficiency of the heat pump.

[0052] The technical solution of the present disclosure will be described below with reference to the accompanying drawings and specific embodiments.

[0053] As shown in Figure 1, some embodiments of the present disclosure provide a throttling device 140. The throttling device 140 can achieve variable flow resistance under different working conditions, thereby improving the efficiency of the heat pump.

[0054] According to some embodiments of the present disclosure, the throttling device 140 is applied between two heat exchangers, and may be in the dishware processing device 100 , or may be applied in a separate air conditioner or heat pump.

[0055] In some embodiments, the throttling device 140 includes a plurality of throttling assemblies 141 , each throttling assembly 141 including a throttling valve 141 a and a control valve 141 b connected in series with the throttling valve 141 a . The control valve 141 b of at least one throttling assembly 141 is connected in parallel with at least one of the other throttling assemblies 141 .

[0056] Each throttle assembly 141 includes a throttle valve 141a and a control valve 141b connected in series. If the control valve 141b of at least one throttle assembly 141 is connected in parallel with at least one of the other throttle assemblies 141, this means that the control valve 141b of one throttle assembly 141 is connected in parallel with another throttle assembly 141. If the control valve 141b is open, the other throttle assembly 141 is short-circuited, and only the throttle valve 141a corresponding to the control valve 141b can be opened. If the control valve 141b is closed and the control valve 141b of the throttle assembly 141 connected in parallel is opened, both throttle valves 141a can be opened. Thus, multiple control valves 141b can be coordinated to connect different numbers of throttle valves 141a, thereby achieving different flow rates. In other words, by coordinating different control valves 141b, the number of throttle valves 141a can be adjusted, thereby adjusting the flow rate. Therefore, there is no need to provide throttle valves 141a with different flow rates, thereby reducing the variable flow rate cost.

[0057] The opening degrees of the multiple throttle valves 141a can be the same or different, and the flow rate can be adjusted by the number of connected valves.

[0058] In order to more clearly illustrate the above structure, the throttling device 140 is taken as an example including two throttling components.

[0059] In some embodiments, the plurality of throttle assemblies may include a first throttle assembly 142 and a second throttle assembly 143. The first throttle assembly 142 includes a first throttle valve 142a and a first control valve 142b. The second throttle assembly 143 includes a second throttle valve 143a and a second control valve 143b. The first control valve 142b is connected in series with the first throttle valve 142a, the second control valve 143b is connected in series with the second throttle valve 141a, and the second control valve 143b is connected in parallel with the first throttle valve 142a and the first control valve 142b.

[0060] That is, second control valve 143b is connected to both ends of first throttle assembly 142, and is connected in parallel with the entire first throttle assembly 142. When first control valve 142b is open and second control valve 143b is closed, first throttle valve 142a and second throttle valve 141a operate, limiting flow. When second control valve 143b is open and first control valve 142b is closed, only second throttle valve 141a operates, limiting flow.

[0061] As shown in Figure 2, when the throttling device 140 also includes a third throttling assembly 145, the third throttling assembly 145 also includes a connected third throttling valve 145a and a third control valve 145b. The third throttling valve 145a is connected in series with the second throttling valve 141a, and the third control valve 145b is connected in parallel with the second throttling assembly 143. When the first control valve 142b is open and the second control valve 143b and the third control valve are closed, the first throttling valve 142a, the second throttling valve 141a, and the third throttling valve 145a operate, and the first throttling valve 142a, the second throttling valve 141a, and the third throttling valve 145a limit the flow. When the second control valve 143b is open and the first control valve 142b and the third control valve 145b are closed, the second throttling valve 141a and the third throttling valve 145a operate, and the first throttling valve 142a does not operate. When the third control valve 145b is open and the first control valve 142b and the second control valve 143b are closed, only the third throttle valve 145a operates.

[0062] The connection relationship between the multiple throttle assemblies and the control valve 141b, the throttle valve 141b or other components is as follows. When the multiple throttle assemblies also include other throttle assemblies, they can all refer to the case where the multiple throttle assemblies include the first throttle assembly 142 and the second throttle assembly 143, and the corresponding connection relationship will not be repeated.

[0063] In some embodiments, first control valve 142b, first throttle valve 142a, and second throttle valve 141a are connected in sequence. A first connection point 146a is defined between first throttle valve 142a and second throttle valve 141a. One end of second control valve 143b is connected to first connection point 146a. That is, second control valve 143b is connected between first throttle valve 142a and second throttle valve 141a, thereby short-circuiting first throttle valve 142a.

[0064] In some embodiments, the end of the second control valve 143b away from the first connection point 146a is connected to the end of the first control valve 142b away from the first throttle valve 142a to form an input point 146b. The end of the second throttle valve 141a away from the first throttle valve 142a forms an output point 146c.

[0065] In some embodiments, the input point 146b and the output point 146c are used to connect to external components. If the throttling device 140 is disposed between two heat exchangers, the input point 146b and the output point 146c are connected to the two heat exchangers respectively.

[0066] In some embodiments, the first throttle valve 142a is connected in series with the second throttle valve 141a.

[0067] According to the working principle of the throttling device 140 in some embodiments of the present disclosure: each throttling assembly 141 includes a throttle valve 141a and a control valve 141b connected in series with the throttle valve 141a. If the control valve 141b of at least one of the throttle assemblies 141 is connected in parallel with at least one of the other throttle assemblies 141, it means that the control valve 141b of one of the throttle assemblies 141 is connected in parallel with the other throttle assembly 141. If the control valve 141b is opened, the other throttle assembly 141 is short-circuited, and only the throttle valve 141a corresponding to the control valve 141b can be turned on. If the control valve 141b is closed and the control valve 141b of the throttle assembly 141 connected in parallel with it is opened, the two throttle valves 141a can be turned on.

[0068] According to some embodiments of the throttling device 140 disclosed herein, each throttling assembly 141 includes a throttle valve 141a and a control valve 141b connected in series therewith. If the control valve 141b of at least one throttle assembly 141 is connected in parallel with at least one of the other throttle assemblies 141, this means that the control valve 141b of one throttle assembly 141 is connected in parallel with the other throttle assembly 141. If the control valve 141b is open, the other throttle assembly 141 is short-circuited, and only the throttle valve 141a corresponding to the control valve 141b can be opened. If the control valve 141b is closed and the control valve 141b of the throttle assembly 141 connected in parallel with it is opened, both throttle valves 141a can be opened. Thus, multiple control valves 141b can be coordinated to connect different numbers of throttle valves 141a, thereby achieving different flow rates. In other words, different control valves 141b can be coordinated to adjust the number of throttle valves 141a, thereby adjusting the flow rate. Therefore, there is no need to provide throttle valves 141a with different flow rates, thereby reducing the variable flow rate cost.

[0069] As shown in FIG3 , based on the same inventive concept, according to some embodiments of the present disclosure, a dishware processing device 100 is further provided, comprising: a housing 110 having a receiving chamber 112, an air outlet 113, a return air port 114, a water outlet 115, and a return water port 116 connected to the receiving chamber 112, wherein the receiving chamber 112 is used to receive dishware; a return air duct 120, a fan 132, a first heat exchanger 134, and a second heat exchanger 136, wherein the return air duct 120 is connected to the air outlet 113 and the return air port 114, and the fan 132, the first heat exchanger 134, and the second heat exchanger 136 are all arranged in the return air duct 120. 20, the first heat exchanger 134 is arranged near the air outlet 113, and the second heat exchanger 136 is arranged near the return air outlet 114; the heat pump channel 150, the circulating pump 152 and the third heat exchanger 154, the heat pump channel 150 is connected to the water outlet 115 and the return water outlet 116, and the circulating pump 152 and the third heat exchanger 154 are arranged in the heat pump channel 150; and the compressor 160, the outlet 164 of the compressor 160 is connected to the first heat exchanger 134 and the third heat exchanger 154, and the inlet 162 of the compressor 160 is connected to the second heat exchanger 136 or the first heat exchanger 134.

[0070] As described above, the throttling device 140 may be disposed between any two of the first heat exchanger 134, the second heat exchanger 136, and the third heat exchanger 154. Specifically, the throttling device 140 may be disposed between the first heat exchanger 134 and the second heat exchanger 136, between the first heat exchanger 134 and the third heat exchanger 154, or between the second heat exchanger 136 and the third heat exchanger 154.

[0071] In some embodiments, the housing 110 is the main body of the dishware processing device 100 and serves as the installation base of the dishware processing device 100. The housing 110 can provide an installation base for other components of the dishware processing device 100 and can also provide certain protection for other components of the dishware processing device 100.

[0072] The accommodating cavity 112 is mainly used to accommodate tableware. Multiple layers of bowl baskets can be set in the accommodating cavity 112. Tableware can be placed on the bowl baskets, and the spacing between the bowl baskets can be different, so that different types of tableware can be placed.

[0073] Return air duct 120 connects to air outlet 113 and return air duct 114, forming a drying branch. After the dishes are cleaned, they can be dried through return air duct 120. Heat pump duct 150 is primarily used to heat wash water, which is then sprayed onto the dishes to achieve the desired cleanliness.

[0074] In some embodiments, the throttling device 140 is disposed between the first heat exchanger 134 and the second heat exchanger 136. An input point 146b of the throttling device 140 is connected to the first heat exchanger 134. An input point 146b of the throttling device 140 is connected to the second heat exchanger 136.

[0075] In some embodiments, the throttling device 140 is disposed between the third heat exchanger 154 and the first heat exchanger 134 or the second heat exchanger 136. An input point 146b of the throttling device 140 is connected to the third heat exchanger 154. An output point 146c of the throttling device 140 is connected to the first heat exchanger 134 or the second heat exchanger 136.

[0076] In some embodiments, the air outlet 113 and the return air outlet 114 are disposed on the same side of the housing 110. This facilitates the arrangement of the return air duct 120, reduces the space occupied by the return air duct 120, and makes the dishware processing device 100 more compact, thereby using more space to accommodate dishware and increasing the capacity of the dishware processing device 100.

[0077] In some embodiments, the return air duct 120 is provided with an air inlet 121 and an air outlet 123. The air inlet 121 is provided between the first heat exchanger 134 and the air outlet 113, and the air outlet 123 is provided between the second heat exchanger 136 and the return air outlet 114. When the circulation pump 152 is started, the air inlet 121 and the air outlet 123 are opened, and the air outlet 113 and the return air outlet 114 are closed.

[0078] As shown in Figures 4 and 5, when the heat pump system of the dishware processing device 100 is working, the circulation pump 152 is started. One of the first heat exchanger 134 and the second heat exchanger 136 works as an evaporator, and the other does not work, so that the air in the return air duct 120 is cold air. In order to prevent cold air from entering the accommodating chamber 112, the air outlet 113 and the return air vent 114 can be closed. That is, when the circulation pump 152 is started, the air inlet 121 and the air outlet 123 are opened, allowing external air to enter the return air duct 120, exchange heat with the first heat exchanger 134 or the second heat exchanger 136, and then be discharged from the air outlet 123.

[0079] Since both the first heat exchanger 134 and the second heat exchanger 136 can serve as evaporators, the exhaust port 123 can be disposed between the second heat exchanger 136 and the return air port 114 , that is, the air inlet 121 is disposed close to the air outlet 113 , and the exhaust port 123 is disposed close to the return air port 114 .

[0080] In some embodiments, the dishware processing device 100 may further include a first air valve 125, which is disposed between the air outlet 113 and the air inlet 121. The first air valve 125 can connect the air outlet 113 with the return air passage 120 and disconnect the air inlet 121 from the return air passage 120, or disconnect the air outlet 113 from the return air passage 120 and connect the air inlet 121 to the return air passage 120.

[0081] Since the air inlet 121 and the air outlet 113 are located close to each other, and the air outlet 113 and the air inlet 121 will not be opened or closed at the same time, during operation, either the air outlet 113 is opened and the air inlet 121 is closed, or the air outlet 113 is closed and the air inlet 121 is opened. Therefore, only one air valve can be set to jointly control the air inlet 121 and the air outlet 113. The first air valve 125 is set between the air inlet 121 and the air outlet 113, so that when the dishware processing device 100 is in the drying mode, the first air valve 125 can open the air outlet 113 and close the air inlet 121, so that the hot and humid air in the accommodating chamber 112 can enter the return air channel 120. When the dishware processing device 100 is in the heat pump mode, the first air valve 125 closes the air outlet 113 and opens the air inlet 121.

[0082] In some embodiments, the dishware processing device 100 also includes a second air valve 126, which is arranged between the exhaust port 123 and the return air port 114. The second air valve 126 can connect the exhaust port 123 with the return air channel 120 and disconnect the return air port 114 from the return air channel 120, or can disconnect the exhaust port 123 from the return air channel 120 and connect the return air port 114 to the return air channel 120.

[0083] In other embodiments, since the return air port 114 and the exhaust port 123 are located close to each other, and the return air port 114 and the exhaust port 123 will not be opened or closed at the same time, during operation, either the exhaust port 123 is opened and the return air port 114 is closed, or the exhaust port 123 is closed and the return air port 114 is opened. Therefore, only one air valve can be provided to jointly control the return air port 114 and the exhaust port 123, and the second air valve 126 is provided between the return air port 114 and the exhaust port 123. When the dishware processing device 100 is in the drying mode, the second air valve 126 opens the return air port 114 and closes the exhaust port 123, so that the hot and dry gas in the return air channel 120 can flow back into the accommodating chamber 112. When the dishware processing apparatus 100 is in the heat pump mode, the second air valve 126 closes the return air port 114 and opens the exhaust port 123 , so that the dry and cold air in the return air passage 120 is discharged from the exhaust port 123 to the outside of the return air passage 120 .

[0084] That is to say, when the dishware processing device 100 is in the drying mode, the first air valve 125 opens the air outlet 113 and closes the air inlet 121, and the second air valve 126 opens the return air outlet 114 and closes the exhaust outlet 123, so that the hot and humid gas in the accommodating chamber 112 can enter the return air channel 120 through the air outlet 113, and after being dried by the first heat exchanger 134 and the second heat exchanger 136, dry hot gas is formed. The dry hot gas in the return air channel 120 can flow back to the accommodating chamber 112 through the return air outlet 114. When the dishware processing device 100 is in the heat pump mode, the first air valve 125 closes the air outlet 113 and opens the air inlet 121, and the second air valve 126 closes the return air port 114 and opens the exhaust port 123. The external air enters the return air duct 120 through the air inlet 121, and forms dry and cold gas through heat exchange in the first heat exchanger 134 or the second heat exchanger 136. The dry and cold gas in the return air duct 120 is then discharged from the exhaust port 123 to the outside of the return air duct 120.

[0085] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0086] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this disclosure.

[0087] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A throttling device, arranged between two heat exchangers, the throttling device comprising: A plurality of throttling components, the throttling components comprising: A throttle valve and a control valve connected in series with the throttle valve; The throttle valves of the plurality of throttle assemblies are connected in series, and the control valve of at least one of the throttle assemblies is connected in parallel with at least one of the other throttle assemblies.

2. The throttling device according to claim 1, wherein: The multiple throttling components include a first throttling component and a second throttling component; the first throttling component includes a first throttling valve and a first control valve, and the second throttling component includes a second throttling valve and a second control valve; the first control valve is connected in series with the first throttling valve, the second control valve is connected in series with the second throttling valve, and the second control valve is connected in parallel with the first throttling valve and the first control valve.

3. The throttling device according to claim 2, wherein: The first control valve, the first throttle valve, and the second throttle valve are connected in sequence; there is a first connection point between the first throttle valve and the second throttle valve; and one end of the second control valve is connected to the first connection point.

4. The throttling device according to claim 3, wherein: One end of the second control valve away from the first connection point is connected to a section of the first control valve away from the first throttle valve to form an input point; and one end of the second throttle valve away from the first throttle valve forms an output point.

5. The throttling device according to any one of claims 2 to 4, wherein: The first throttle valve is connected in series with the second throttle valve.

6. A tableware processing device, comprising: A shell body having a containing cavity, an air outlet, an air return port, a water outlet and a water return port connected to the containing cavity, wherein the containing cavity is used to contain tableware; a return air duct, a fan, a first heat exchanger, and a second heat exchanger, wherein the return air duct is connected to the air outlet and the return air outlet, the fan, the first heat exchanger, and the second heat exchanger are all arranged in the return air duct, the first heat exchanger is arranged close to the air outlet, and the second heat exchanger is arranged close to the return air outlet; A heat pump channel, a circulation pump and a third heat exchanger, wherein the heat pump channel is in communication with the water outlet and the water return port, and the circulation pump and the third heat exchanger are arranged in the heat pump channel; A compressor, wherein the outlet of the compressor is connected to the first heat exchanger and the third heat exchanger, and the inlet of the compressor is connected to the second heat exchanger or the first heat exchanger; as well as The throttling device according to any one of claims 1 to 5 is arranged between any two of the first heat exchanger, the second heat exchanger and the third heat exchanger.

7. The tableware processing device according to claim 6, wherein: The throttling device is arranged between the first heat exchanger and the second heat exchanger, an input point of the throttling device is connected to the first heat exchanger, and an input point of the throttling device is connected to the second heat exchanger.

8. The tableware processing device according to claim 6 or 7, wherein: The throttling device is arranged between the third heat exchanger and the first heat exchanger or the second heat exchanger, the input point of the throttling device is connected to the third heat exchanger, and the output point of the throttling device is connected to the first heat exchanger or the second heat exchanger.

9. The tableware processing device according to any one of claims 6 to 8, wherein: The air outlet and the air return outlet are arranged on the same side of the shell.

10. The tableware processing device according to any one of claims 6 to 9, wherein: The return air channel is provided with an air inlet and an air outlet, the air inlet is arranged between the first heat exchanger and the air outlet, and the air outlet is arranged between the second heat exchanger and the return air outlet; when the circulation pump is started, the air inlet and the air outlet are opened, and the air outlet and the return air outlet are closed.

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